US Patent No: 6,553,129
Number of patents in Portfolio can not be more than 2000
Computer system linked by using information in data objects
Stats
-
Apr 22, 2003
Issued date -
Apr 28, 2000
filing date -
09/560,976
serial no -
In Force
status
Importance
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Abstract
Various improvements to steganographic systems, and applications therefore, are disclosed. The improvements include facilitating scale and rotation registration for steganographic decoding by use of rotationally symmetric steganographically embedded patterns and subliminal digital graticules; improved techniques for decoding without access to unencoded originals; improving robustness of steganographic coding in motion pictures and/or in the presence of lossy compression/decompression; and representing data by patterned bit cells whose energy in the spatial domain facilitates decoding registration. Applications include enhanced-security financial transactions, counterfeit resistant identification cards, fraud deterrent systems for cellular telephony, covert modem channels in video transmissions, photo duplication kiosks with automatic copyright detection, and hotlinked image objects (e.g. with embedded URLs) for use on the internet.
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First Claim
Related Publications
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International Classification(s)
- [Classification Symbol]
- [Patents Count]
Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 5,091,966 Adaptive scaling for decoding spatially periodic self-clocking glyph shape codes | 263 | 1990 | |
| 5,128,525 Convolution filtering for decoding self-clocking glyph shape codes | 238 | 1990 | |
| 5,077,795 Security system for electronic printing systems | 121 | 1990 | |
| 5,315,098 Methods and means for embedding machine readable digital data in halftone images | 288 | 1990 | |
| 5,278,400 Multiple threshold encoding of machine readable code | 78 | 1991 | |
| 5,245,165 Self-clocking glyph code for encoding dual bit digital values robustly | 211 | 1991 | |
| 5,449,895 Explicit synchronization for self-clocking glyph codes | 141 | 1993 | |
| 5,444,779 Electronic copyright royalty accounting system using glyphs | 341 | 1994 | |
| 5,572,010 Distributed type labeling for embedded data blocks | 145 | 1995 | |
| 5,576,532 Interleaved and interlaced sync codes and address codes for self-clocking glyph codes | 110 | 1995 | |
| 5,611,575 Distributed state flags or other unordered information for embedded data blocks | 84 | 1995 | |
| 5,680,223 Method and system for labeling a document for storage, manipulation, and retrieval | 70 | 1995 | |
| 5,521,372 Framing codes for robust synchronization and addressing of self-clocking glyph codes | 92 | 1995 | |
| 6,000,621 Tilings of mono-code and dual-code embedded data pattern strips for robust asynchronous capture | 48 | 1995 | |
| 5,761,686 Embedding encoded information in an iconic version of a text image | 306 | 1996 | |
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| 5,734,752 Digital watermarking using stochastic screen patterns | 217 | 1996 | |
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| 4,697,209 Methods and apparatus for automatically identifying programs viewed or recorded | 327 | 1984 | |
| 4,677,466 Broadcast program identification method and apparatus | 359 | 1985 | |
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| 4,805,020 Television program transmission verification method and apparatus | 302 | 1987 | |
| 4,967,273 Television program transmission verification method and apparatus | 269 | 1989 | |
| 5,450,122 In-station television program encoding and monitoring system and method | 113 | 1991 | |
| 5,243,423 Spread spectrum digital data transmission over TV video | 327 | 1991 | |
| 5,481,294 Audience measurement system utilizing ancillary codes and passive signatures | 343 | 1993 | |
| 5,425,100 Universal broadcast code and multi-level encoded signal monitoring system | 179 | 1994 | |
| 5,526,427 Universal broadcast code and multi-level encoded signal monitoring system | 136 | 1994 | |
| 5,737,025 Co-channel transmission of program signals and ancillary signals | 110 | 1995 | |
| 5,737,026 Video and data co-channel communication system | 35 | 1995 | |
| 5,850,249 Receiver monitoring system with local encoding | 60 | 1995 | |
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| 4,252,995 Radio broadcasting system with transmitter identification | 116 | 1978 | |
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| 5,161,210 Coder for incorporating an auxiliary information signal in a digital audio signal, decoder for recovering such signals from the combined signal, and record carrier having such combined signal recorded thereon | 263 | 1989 | |
| 5,083,224 Apparatus for recording an audio signal with protection against re-recording thereof, and recording apparatus which indicates the presence of such protection | 58 | 1990 | |
| 5,146,457 Device for transmitting data words representing a digitalized analog signal and device for receiving the transmitted data words | 171 | 1991 | |
| 5,453,968 Methods of and information recording devices for recording and/or inhibiting recording of an information signal having copy bits with logic values which alternate in accordance with a pattern | 116 | 1994 | |
| 5,649,054 Method and apparatus for coding digital sound by subtracting adaptive dither and inserting buried channel bits and an apparatus for decoding such encoding digital sound | 84 | 1994 | |
| 5,796,785 Digital audio broadcast receiver having circuitry for retrieving embedded data and for supplying the retrieved data to peripheral devices | 20 | 1996 | |
| 6,131,161 Marking a digitally encoded video and/or audio signal | 83 | 1996 | |
| 5,940,134 Marking a video and/or audio signal | 70 | 1996 | |
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| 5,258,998 Data communication apparatus permitting confidential communication | 64 | 1991 | |
| 5,907,443 Recording and reproducing apparatus adapted to selectively control the number of copies made | 79 | 1992 | |
| 5,541,741 Image processing with anti-forgery provision | 104 | 1992 | |
| 5,857,038 Image processing apparatus and method for synthesizing first and second image data | 205 | 1994 | |
| 5,719,984 Video signal recording apparatus with facility for displaying of identification information relating to the video signal | 45 | 1994 | |
| 5,960,151 Recording and reproducing apparatus which prohibits copying of an externally supplied signal and allows unlimited copying of an internally generated signal | 53 | 1994 | |
| 5,661,574 Image processing method and apparatus for adding identifying information to an image portion and forming the portion at a lower of plural resolutions | 95 | 1995 | |
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| 5,768,426 Graphics processing system employing embedded code signals | 458 | 1994 | |
| 5,636,292 Steganography methods employing embedded calibration data | 584 | 1995 | |
| 5,710,834 Method and apparatus responsive to a code signal conveyed through a graphic image | 257 | 1995 | |
| 5,748,763 Image steganography system featuring perceptually adaptive and globally scalable signal embedding | 309 | 1995 | |
| 5,748,783 Method and apparatus for robust information coding | 394 | 1995 | |
| 5,765,152 System and method for managing copyrighted electronic media | 799 | 1995 | |
| 5,745,604 Identification/authentication system using robust, distributed coding | 261 | 1996 | |
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| 5,774,452 Apparatus and method for encoding and decoding information in audio signals | 291 | 1995 | |
| 5,822,360 Method and apparatus for transporting auxiliary data in audio signals | 217 | 1995 | |
| 5,687,191 Post-compression hidden data transport | 181 | 1996 | |
| 5,828,325 Apparatus and method for encoding and decoding information in analog signals | 168 | 1996 | |
| 5,719,937 Multi-media copy management system | 203 | 1996 | |
| 5,937,000 Method and apparatus for embedding auxiliary data in a primary data signal | 118 | 1996 | |
| 5,901,178 Post-compression hidden data transport for video | 125 | 1997 | |
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| 5,428,606 Digital information commodities exchange | 434 | 1993 | |
| 5,539,735 Digital information commodities exchange | 294 | 1994 | |
| 5,613,004 Steganographic method and device | 617 | 1995 | |
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| 5,822,432 Method for human-assisted random key generation and application for digital watermark system | 260 | 1996 | |
| 5,889,868 Optimization methods for the insertion, protection, and detection of digital watermarks in digitized data | 351 | 1996 | |
| 6,078,664 Z-transform implementation of digital watermarks | 102 | 1996 | |
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| 4,775,901 Apparatus and method for preventing unauthorized dubbing of a recorded signal | 143 | 1986 | |
| 5,418,853 Apparatus and method for preventing unauthorized copying of video signals | 190 | 1993 | |
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| 5,646,997 Method and apparatus for embedding authentication information within digital data | 570 | 1994 | |
| 5,537,216 Circuit for including a copy-inhibit signal with a video signal | 57 | 1995 | |
| 5,991,500 Copy control for a video signal with copyright signals superimposed as predetermined bits in the VBID data of the video signal | 125 | 1997 | |
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| 5,327,237 Transmitting data with video | 148 | 1991 | |
| 5,559,559 Transmitting a secondary signal with dynamic injection level control | 120 | 1993 | |
| 5,557,333 System for transparent transmission and reception of a secondary data signal with a video signal in the video band | 115 | 1994 | |
| 5,572,247 Processor for receiving data from a video signal | 100 | 1994 | |
| 5,587,743 Signal processors for transparent and simultaneous transmission and reception of a data signal in a video signal | 125 | 1994 | |
| 5,617,148 Filter by-pass for transmitting an additional signal with a video signal | 117 | 1995 | |
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| 5,436,653 Method and system for recognition of broadcast segments | 218 | 1992 | |
| 5,450,490 Apparatus and methods for including codes in audio signals and decoding | 409 | 1994 | |
| 5,579,124 Method and apparatus for encoding/decoding broadcast or recorded segments and monitoring audience exposure thereto | 375 | 1995 | |
| 5,764,763 Apparatus and methods for including codes in audio signals and decoding | 193 | 1995 | |
| 5,581,800 Method and apparatus for automatically identifying a program including a sound signal | 232 | 1995 | |
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| 5,404,377 Simultaneous transmission of data and audio signals by means of perceptual coding | 248 | 1994 | |
| 5,541,662 Content programmer control of video and data display using associated data | 215 | 1994 | |
| 5,614,940 Method and apparatus for providing broadcast information with indexing | 264 | 1994 | |
| 5,473,631 Simultaneous transmission of data and audio signals by means of perceptual coding | 194 | 1995 | |
| 5,809,139 Watermarking method and apparatus for compressed digital video | 359 | 1996 | |
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| 6,086,706 Document copying deterrent method | 100 | 1993 | |
| 5,629,770 Document copying deterrent method using line and word shift techniques | 140 | 1995 | |
| 5,826,227 Hiding a source identifier within a signal | 50 | 1995 | |
| 5,663,766 Digital data encoding in video signals using data modulated carrier signals at non-peaks in video spectra | 214 | 1996 | |
| 5,929,920 System and method for encoding digital information in a television signal | 27 | 1997 | |
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| 5,315,448 Copy protection for hybrid digital video tape recording and unprotected source material | 210 | 1993 | |
| 5,513,260 Method and apparatus for copy protection for various recording media | 207 | 1994 | |
| 5,574,787 Apparatus and method for comprehensive copy protection for video platforms and unprotected source material | 220 | 1994 | |
| 5,739,864 Apparatus for inserting blanked formatted fingerprint data (source ID, time/date) in to a video signal | 79 | 1994 | |
| 5,659,613 Method and apparatus for copy protection for various recording media using a video finger print | 116 | 1995 | |
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| 4,827,508 Database usage metering and protection system and method | 792 | 1985 | |
| 4,977,594 Database usage metering and protection system and method | 645 | 1989 | |
| 5,050,213 Database usage metering and protection system and method | 560 | 1990 | |
| 5,410,598 Database usage metering and protection system and method | 567 | 1994 | |
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| 4,903,301 Method and system for transmitting variable rate speech signal | 142 | 1988 | |
| 5,627,655 Recording apparatus and reproducing apparatus for video signals | 93 | 1994 | |
| 2005/0204,105 Remote copy system | 2004 | ||
| 2005/0204,105 Remote copy system | 2004 | ||
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| 4,231,113 Anti-jam communications system | 132 | 1968 | |
| 5,422,995 Method and means for fast writing of run length coded bit strings into bit mapped memory and the like | 99 | 1993 | |
| 5,532,920 Data processing system and method to enforce payment of royalties when copying softcopy books | 373 | 1994 | |
| 5,530,759 Color correct digital watermarking of images | 378 | 1995 | |
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| 5,848,155 Spread spectrum watermark for embedded signalling | 259 | 1996 | |
| 6,069,914 Watermarking of image data using MPEG/JPEG coefficients | 140 | 1996 | |
| 5,930,369 Secure spread spectrum watermarking for multimedia data | 426 | 1997 | |
| 2002/0114,513 Color image processing device and color image processing method | 1 | 2002 | |
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| 4,637,051 System having a character generator for printing encrypted messages | 193 | 1983 | |
| 4,660,221 System for printing encrypted messages with bar-code representation | 216 | 1983 | |
| 4,864,618 Automated transaction system with modular printhead having print authentication feature | 988 | 1988 | |
| 5,469,506 Apparatus for verifying an identification card and identifying a person by means of a biometric characteristic | 278 | 1994 | |
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| 5,408,542 Method and apparatus for real-time lossless compression and decompression of image data | 165 | 1992 | |
| 5,267,334 Encoding/decoding moving images with forward and backward keyframes for forward and reverse display | 278 | 1993 | |
| 5,905,819 Method and apparatus for hiding one image or pattern within another | 133 | 1996 | |
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| 4,425,661 Data under voice communications system | 193 | 1981 | |
| 4,425,642 Simultaneous transmission of two information signals within a band-limited communications channel | 371 | 1982 | |
| 4,672,605 Data and voice communications system | 361 | 1984 | |
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| 4,237,484 Technique for transmitting digital data together with a video signal | 162 | 1979 | |
| 4,313,197 Spread spectrum arrangement for (de)multiplexing speech signals and nonspeech signals | 268 | 1980 | |
| 4,495,620 Transmitting data on the phase of speech | 132 | 1982 | |
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| 5,568,570 Method and apparatus for reducing quantization artifacts in a hierarchical image storage and retrieval system | 219 | 1994 | |
| 5,859,920 Method for embedding digital information in an image | 233 | 1995 | |
| 5,835,639 Method for detecting rotation and magnification in images | 106 | 1996 | |
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| 5,010,405 Receiver-compatible enhanced definition television system | 187 | 1989 | |
| 5,689,587 Method and apparatus for data hiding in images | 200 | 1996 | |
| 5,893,067 Method and apparatus for echo data hiding in audio signals | 106 | 1996 | |
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| 5,987,459 Image and document management system for content-based retrieval | 62 | 1997 | |
| 6,031,914 Method and apparatus for embedding data, including watermarks, in human perceptible images | 173 | 1997 | |
| 6,061,793 Method and apparatus for embedding data, including watermarks, in human perceptible sounds | 186 | 1997 | |
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| 5,319,724 Apparatus and method for compressing still images | 123 | 1991 | |
| 5,337,362 Method and apparatus for placing data onto plain paper | 136 | 1993 | |
| 5,432,870 Method and apparatus for compressing and decompressing images of documents | 139 | 1993 | |
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| 5,659,726 Data embedding | 306 | 1995 | |
| 5,727,092 Compression embedding | 138 | 1995 | |
| 5,778,102 Compression embedding | 189 | 1996 | |
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| 5,422,963 Block transform coder for arbitrarily shaped image segments | 122 | 1993 | |
| 5,509,074 Method of protecting electronically published materials using cryptographic protocols | 193 | 1994 | |
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| 5,629,980 System for controlling the distribution and use of digital works | 948 | 1994 | |
| 5,638,443 System for controlling the distribution and use of composite digital works | 675 | 1994 | |
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| 4,739,377 Confidential document reproduction method and apparatus | 248 | 1986 | |
| 5,784,461 Security system for controlling access to images and image related services | 69 | 1996 | |
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| 4,965,827 Authenticator | 136 | 1988 | |
| 5,063,446 Apparatus for transmitting auxiliary signal in a TV channel | 136 | 1989 | |
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| 5,943,422 Steganographic techniques for securely delivering electronic digital rights management control information over insecure communication channels | 651 | 1996 | |
| 5,892,900 Systems and methods for secure transaction management and electronic rights protection | 1511 | 1996 | |
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| 5,199,081 System for recording an image having a facial image and ID information | 181 | 1990 | |
| 5,652,626 Image processing apparatus using pattern generating circuits to process a color image | 298 | 1994 | |
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| 5,602,920 Combined DCAM and transport demultiplexer | 89 | 1995 | |
| 5,799,081 Illegal view/copy protection method and apparatus for digital broadcasting system | 90 | 1995 | |
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| 4,423,415 Non-counterfeitable document system | 188 | 1981 | |
| 4,811,408 Image dissecting document verification system | 163 | 1987 | |
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| 5,970,140 Modular error embedding | 26 | 1996 | |
| 5,819,289 Data embedding employing degenerate clusters of data having differences less than noise value | 96 | 1997 | |
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| 4,979,210 Method and apparatus for protection of signal copy | 262 | 1988 | |
| 5,513,011 Method and apparatus for recording or reproducing video data on or from storage media | 50 | 1994 | |
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| 4,876,617 Signal identification | 239 | 1987 | |
| 5,113,437 Signal identification system | 245 | 1989 | |
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| 5,479,168 Compatible signal encode/decode system | 162 | 1993 | |
| 5,539,471 System and method for inserting and recovering an add-on data signal for transmission with a video signal | 136 | 1994 | |
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| 4,654,867 Cellular voice and data radiotelephone system | 221 | 1986 | |
| 4,993,068 Unforgeable personal identification system | 706 | 1989 | |
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| 5,213,337 System for communication using a broadcast audio signal | 298 | 1988 | |
| 5,825,892 Protecting images with an image watermark | 386 | 1996 | |
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| 5,299,019 Image signal band compressing system for digital video tape recorder | 144 | 1992 | |
| 5,461,426 Apparatus for processing modified NTSC television signals, with digital signals buried therewithin | 116 | 1993 | |
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| 5,548,646 System for signatureless transmission and reception of data packets between computer networks | 201 | 1994 | |
| 5,530,852 Method for extracting profiles and topics from a first file written in a first markup language and generating files in different markup languages containing the profiles and topics for use in accessing data described by the profiles and topics | 820 | 1994 | |
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| 5,799,082 Secure authentication of images | 77 | 1995 | |
| 5,764,770 Image authentication patterning | 106 | 1997 | |
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| 5,638,446 Method for the secure distribution of electronic files in a distributed environment | 221 | 1995 | |
| 5,905,505 Method and system for copy protection of on-screen display of text | 36 | 1996 | |
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| 5,200,993 Public telephone network including a distributed imaging system | 122 | 1991 | |
| 5,666,487 Network providing signals of different formats to a user by multplexing compressed broadband data with data of a different format into MPEG encoded data stream | 305 | 1995 | |
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| 4,941,150 Spread spectrum communication system | 134 | 1988 | |
| 4,943,976 Spread spectrum communication system | 123 | 1989 | |
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| 5,036,513 Method of and apparatus for integrated voice (audio) communication simultaneously with "under voice" user-transparent digital data between telephone instruments | 263 | 1989 | |
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| 4,885,632 System and methods for monitoring TV viewing system including a VCR and/or a cable converter | 191 | 1988 | |
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| 4,996,530 Statistically based continuous autocalibration method and apparatus | 126 | 1989 | |
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| 5,319,453 Method and apparatus for video signal encoding, decoding and monitoring | 257 | 1989 | |
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| 5,185,736 Synchronous optical transmission system | 282 | 1989 | |
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| 5,524,933 Method for the marking of documents | 138 | 1994 | |
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| 5,432,542 Television receiver location identification | 208 | 1992 | |
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| 4,703,476 Encoding of transmitted program material | 179 | 1986 | |
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| 4,943,973 Spread-spectrum identification signal for communications system | 232 | 1989 | |
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| 5,428,607 Intra-switch communications in narrow band ATM networks | 306 | 1993 | |
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| 5,259,025 Method of verifying fake-proof video identification data | 201 | 1992 | |
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| 5,379,345 Method and apparatus for the processing of encoded data in conjunction with an audio broadcast | 320 | 1993 | |
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| 5,148,498 Image coding apparatus and method utilizing separable transformations | 173 | 1990 | |
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| 5,404,160 System and method for identifying a television program | 117 | 1993 | |
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| 5,709,932 Ultra thin heat-shrinkable monolayer polyethylene films | 23 | 1995 | |
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| 5,515,081 System and methods for improved storage and processing of BITMAP images | 100 | 1993 | |
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| 5,075,773 Data transmission in active picture period | 107 | 1989 | |
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| 5,253,078 System for compression and decompression of video data using discrete cosine transform and coding techniques | 276 | 1990 | |
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| 5,325,167 Record document authentication by microscopic grain structure and method | 160 | 1992 | |
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| 4,921,278 Identification system using computer generated moire | 146 | 1988 | |
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| 5,544,255 Method and system for the capture, storage, transport and authentication of handwritten signatures | 191 | 1994 | |
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| 4,262,329 Security system for data processing | 236 | 1978 | |
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| 5,524,936 Torque tight locking device | 20 | 1995 | |
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| 4,675,746 System for forming picture, alphanumeric and micrographic images on the surface of a plastic card | 179 | 1986 | |
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| 5,293,399 Identification system | 110 | 1991 | |
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| 5,305,400 Method of encoding and decoding the video data of an image sequence | 118 | 1992 | |
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| 5,712,920 Method for the compatible transmission and/or storage and decoding of an auxiliary signal | 64 | 1993 | |
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| 5,086,469 Encryption with selective disclosure of protocol identifiers | 60 | 1990 | |
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| 4,590,366 Method of securing simple codes | 171 | 1984 | |
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| 4,884,139 Method of digital sound broadcasting in television channels with spectrum interlacing | 124 | 1987 | |
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| 5,826,892 Push luggage cart | 4 | 1996 | |
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| 5,568,268 Image forming device with forgery prevention | 63 | 1995 | |
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| 4,225,967 Broadcast acknowledgement method and system | 230 | 1978 | |
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| 4,920,503 Computer remote control through a video signal | 110 | 1988 | |
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| 4,765,656 Data carrier having an optical authenticity feature and methods for producing and testing said data carrier | 188 | 1986 | |
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| 5,295,203 Method and apparatus for vector coding of video transform coefficients | 143 | 1992 | |
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| 5,659,732 Document retrieval over networks wherein ranking and relevance scores are computed at the client for multiple database documents | 256 | 1995 | |
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|||
| 4,547,804 Method and apparatus for the automatic identification and verification of commercial broadcast programs | 350 | 1983 | |
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| 4,389,671 Digitally-controlled analog encrypton | 194 | 1980 | |
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|||
| 5,530,751 Embedded hidden identification codes in digital objects | 234 | 1994 | |
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|||
| 5,878,010 Method and apparatus for recording digital signal | 30 | 1995 | |
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| 4,644,582 Image registration method | 114 | 1984 | |
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| 4,553,261 Document and data handling and retrieval system | 224 | 1983 | |
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| 5,721,788 Method and system for digital image signatures | 549 | 1992 | |
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| 4,807,031 Interactive video method and apparatus | 536 | 1987 | |
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| 5,228,056 Synchronous spread-spectrum communications system and method | 228 | 1990 | |
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| 5,374,976 Support provided with a machine detectable copying security element | 158 | 1993 | |
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| 4,230,990 Broadcast program identification method and system | 438 | 1979 | |
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| 5,987,127 Image forming apparatus and copy management system | 54 | 1997 | |
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| 5,398,283 Encryption device | 103 | 1993 | |
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| 4,476,468 Secure transaction card and verification system | 152 | 1983 | |
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|||
| 5,845,281 Method and system for managing a data object so as to comply with predetermined conditions for usage | 308 | 1996 | |
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| 5,671,277 Image forming apparatus and copy management system | 130 | 1994 | |
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|||
| 4,820,912 Method and apparatus for checking the authenticity of documents | 161 | 1986 | |
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|||
| 5,181,786 Method and apparatus for producing admission tickets | 153 | 1990 | |
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| 5,200,822 Arrangement for and method of processing data, especially for identifying and verifying airing of television broadcast programs | 300 | 1991 | |
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| 5,582,103 Method for making an anti-counterfeit latent image formation object for bills, credit cards, etc. | 100 | 1995 | |
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| 5,915,027 Digital watermarking | 422 | 1996 | |
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| 5,280,537 Digital communication system using superposed transmission of high speed and low speed digital signals | 254 | 1992 | |
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| 4,238,849 Method of and system for transmitting two different messages on a carrier wave over a single transmission channel of predetermined bandwidth | 240 | 1978 | |
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| 5,166,676 Identification system | 175 | 1990 | |
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| 5,500,856 Transmission de-correlator for eliminating interference in a CDMA communication system | 55 | 1994 | |
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|||
| 5,862,218 Method and apparatus for in-camera image marking and authentication | 178 | 1996 | |
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| 5,095,196 Security system with imaging function | 174 | 1989 | |
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|||
| 5,257,199 Apparatus for identifying tools and for managing tool data | 42 | 1993 | |
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|||
| 4,939,615 Latching and release system for ground fault receptacle | 26 | 1989 | |
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|
|||
| 5,647,017 Method and system for the verification of handwritten signatures | 97 | 1996 | |
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|||
| 4,682,794 Secure identification card and system | 133 | 1985 | |
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|
|||
| 4,855,827 Method of providing identification, other digital data and multiple audio tracks in video systems | 213 | 1987 | |
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|||
| 4,879,747 Method and system for personal identification | 319 | 1988 | |
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|||
| 4,750,173 Method of transmitting audio information and additional information in digital form | 223 | 1986 | |
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|||
| 4,718,106 Survey of radio audience | 185 | 1986 | |
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| 4,395,600 Auditory subliminal message system and method | 157 | 1980 | |
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|||
| 5,077,608 Video effects system able to intersect a 3-D image with a 2-D image | 138 | 1990 | |
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| 4,677,435 Surface texture reading access checking system | 139 | 1985 | |
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| 5,103,459 System and method for generating signal waveforms in a CDMA cellular telephone system | 1482 | 1990 | |
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|||
| 5,319,735 Embedded signalling | 536 | 1991 | |
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|
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| 4,647,974 Station signature system | 162 | 1985 | |
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| 4,811,357 Secondary channel for digital modems using spread spectrum subliminal induced modulation | 174 | 1988 | |
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| 4,776,013 Method and apparatus of encryption of optical images | 136 | 1987 | |
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|||
| 5,247,364 Method and apparatus for tuning data channels in a subscription television system having in-band data transmissions | 238 | 1991 | |
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| 5,245,329 Access control system with mechanical keys which store data | 253 | 1989 | |
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| 4,532,508 Personal authentication system | 132 | 1983 | |
|
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|||
| 5,606,609 Electronic document verification system and method | 547 | 1994 | |
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|
|||
| 5,537,223 Rotating non-rotationally symmetrical halftone dots for encoding embedded data in a hyperacuity printer | 102 | 1994 | |
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|
|||
| 5,689,623 Spread spectrum digital screening | 67 | 1995 | |
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|||
| 4,367,488 Data encoding for television | 206 | 1981 | |
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|||
| 4,380,027 Data encoding for television | 207 | 1980 | |
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|||
| 5,781,629 Digital document authentication system | 165 | 1997 | |
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|||
| 5,349,655 Method for recovery of a computer program infected by a computer virus | 115 | 1992 | |
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|
|||
| 5,337,361 Record with encoded data | 352 | 1992 | |
|
|
|||
| 5,134,496 Bilateral anti-copying device for video systems | 116 | 1989 | |
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|
|||
| 4,665,431 Apparatus and method for receiving audio signals transmitted as part of a television video signal | 182 | 1982 | |
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|
|||
| 4,969,041 Embedment of data in a video signal | 303 | 1988 | |
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|
|||
| 4,379,947 System for transmitting data simultaneously with audio | 239 | 1979 | |
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|||
| 4,866,771 Signaling system | 113 | 1987 | |
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|
|||
| 5,499,294 Digital camera with apparatus for authentication of images produced from an image file | 413 | 1995 | |
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|
|||
| 4,835,517 Modem for pseudo noise communication on A.C. lines | 176 | 1984 | |
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|||
| 5,568,179 Method and apparatus for device control by data transmission in TV lines | 77 | 1993 | |
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|
|||
| 4,963,998 Apparatus for marking a recorded signal | 140 | 1989 | |
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| 5,079,648 Marked recorded signals | 187 | 1989 | |
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|
|||
| 4,908,873 Document reproduction security system | 289 | 1983 | |
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|
|||
| 5,168,146 Bi-directional snap-action register display mechanism | 35 | 1989 | |
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|
|||
| 4,908,836 Method and apparatus for decoding multiple bit sequences that are transmitted simultaneously in a single channel | 151 | 1988 | |
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|||
| 4,874,936 Hexagonal, information encoding article, process and system | 242 | 1988 | |
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|||
| 5,590,197 Electronic payment system and method | 697 | 1995 | |
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|
|||
| 5,387,941 Data with video transmitter | 185 | 1992 | |
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|
|||
| 4,663,518 Optical storage identification card and read/write system | 213 | 1985 | |
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|
|||
| 5,488,664 Method and apparatus for protecting visual information with printed cryptographic watermarks | 139 | 1994 | |
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|
|||
| 5,613,012 Tokenless identification system for authorization of electronic transactions and electronic transmissions | 531 | 1995 | |
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|
|||
| 5,027,401 System for the secure storage and transmission of data | 186 | 1990 | |
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|
|||
| 4,528,588 Method and apparatus for marking the information content of an information carrying signal | 411 | 1982 | |
| 4,595,950 Method and apparatus for marking the information content of an information carrying signal | 325 | 1984 | |
| 4,712,103 Door lock control system | 148 | 1985 | |
| 4,944,036 Signature filter system | 124 | 1987 | |
| 4,972,476 Counterfeit proof ID card having a scrambled facial image | 238 | 1989 | |
| 4,972,471 Encoding system | 287 | 1989 | |
| 5,144,660 Securing a computer against undesired write operations to or read operations from a mass storage device | 186 | 1989 | |
| 5,212,551 Method and apparatus for adaptively superimposing bursts of texts over audio signals and decoder thereof | 139 | 1989 | |
| 5,150,409 Device for the identification of messages | 120 | 1990 | |
| 5,396,559 Anticounterfeiting method and device utilizing holograms and pseudorandom dot patterns | 219 | 1990 | |
| 5,394,274 Anti-copy system utilizing audible and inaudible protection signals | 164 | 1993 | |
| 5,351,302 Method for authenticating objects identified by images or other identifying information | 177 | 1993 | |
| 5,446,273 Credit card security system | 96 | 1994 | |
| 5,612,943 System for carrying transparent digital data within an audio signal | 115 | 1994 | |
| 5,664,018 Watermarking process resilient to collusion attacks | 373 | 1996 | |
Patent Citation Ranking
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Oct 22, 2014 |
| Fee | Large entity fee | small entity fee | micro entity fee |
|---|---|---|---|
| Surcharge - 11.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
| Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |