US Patent No: 6,922,480
Number of patents in Portfolio can not be more than 2000
Methods for encoding security documents
Stats
-
Jul 26, 2005
Issued date -
Jul 29, 2002
filing date -
10/208,735
serial no -
In Force
status
Importance
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Abstract
Line art on a banknote or other security document is slightly changed to effect the encoding of plural-bit digital data (i.e. the banknote is digitally watermarked). When such a banknote is thereafter scanned, the resulting image data can be recognized as corresponding to a banknote by detection of the encoded data. (Alternatively, the image data can be recognized as corresponding to a banknote by machine detection of other forms of watermarking, or by reference to visible structures characteristic of banknotes.) In response to detection of a banknote, the detecting apparatus (e.g., a scanner, photocopier, or printer) can intervene so as to prevent or deter counterfeiting. For example, the apparatus can interrupt a copying operation, and display a message reminding the operator that it is illegal to reproduce currency. Another option is to dial a remote service and report the attempted reproduction of a banknote. Yet another option is to permit the copying, but to insert forensic tracer data (e.g. steganographically encoded binary data) in the resultant copy. The tracer data can memorialize the serial number of the machine that made the copy and/or the date and time the copy was made. To address privacy concerns, such tracer data is not normally inserted in photocopied output, but is so inserted only when the subject being photocopied is detected as being a banknote.
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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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| 5,768,426 Graphics processing system employing embedded code signals | 459 | 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 | 258 | 1995 | |
| 5,748,763 Image steganography system featuring perceptually adaptive and globally scalable signal embedding | 311 | 1995 | |
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| 5,850,481 Steganographic system | 252 | 1995 | |
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| 5,841,886 Security system for photographic identification | 267 | 1996 | |
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| 6,345,104 Digital watermarks and methods for security documents | 212 | 1998 | |
| 6,549,638 Methods for evidencing illicit use of a computer system or device | 45 | 1998 | |
| 6,546,112 Security document with steganographically-encoded authentication data | 84 | 1998 | |
| 6,580,819 Methods of producing security documents having digitally encoded data and documents employing same | 92 | 1999 | |
| 6,285,776 Methods for identifying equipment used in counterfeiting | 139 | 1999 | |
| 6,427,020 Methods and devices for recognizing banknotes and responding accordingly | 152 | 1999 | |
| 6,343,138 Security documents with hidden digital data | 218 | 1999 | |
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| 6,252,963 Method and system for preventing reproduction of documents | 49 | 1999 | |
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| 6,724,912 Digital watermarking of physical objects | 61 | 2000 | |
| 6,332,031 Multiple watermarking techniques for documents and other data | 137 | 2000 | |
| 6,522,771 Processing scanned security documents notwithstanding corruptions such as rotation | 67 | 2001 | |
| 2001/0022,848 Method of producing a security document | 54 | 2001 | |
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| 5,077,795 Security system for electronic printing systems | 121 | 1990 | |
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| 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 | |
| 5,539,841 Method for comparing image sections to determine similarity therebetween | 84 | 1995 | |
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| 5,692,073 Formless forms and paper web using a reference-based mark extraction technique | 976 | 1996 | |
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| 6,081,345 Line screen having extended dynamic tone range for embedding machine readable data in halftone images | 30 | 1998 | |
| 6,321,648 Systems and methods for unforgeable document tagging | 36 | 2000 | |
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| 5,541,741 Image processing with anti-forgery provision | 104 | 1992 | |
| 5,426,710 Image reading or processing with ability to prevent copying of certain originals | 33 | 1992 | |
| 6,166,750 Image processing apparatus and method for adding predetermined additional information to an image by adding a predetermined number of unit dots to partial color component data of the image | 46 | 1993 | |
| 5,321,470 Apparatus with anti-forgery provision | 111 | 1993 | |
| 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 | |
| 5,424,807 Image processing apparatus with forgery prevention system | 44 | 1994 | |
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| 5,583,614 Image processing apparatus and method for determining whether an original contains a specified image | 43 | 1995 | |
| 5,633,952 Identification of a particular color image using color distribution, and circuitry for same | 45 | 1995 | |
| 5,949,903 Indentification of a particular color image using distribution, and circuitry for same | 19 | 1995 | |
| 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 | |
| 5,790,932 Image forming apparatus for delaying the processing of image data whether the image represented by the image data is a predetermined image | 46 | 1997 | |
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| 4,697,209 Methods and apparatus for automatically identifying programs viewed or recorded | 328 | 1984 | |
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| 5,243,423 Spread spectrum digital data transmission over TV video | 327 | 1991 | |
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| 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 | |
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| 5,537,216 Circuit for including a copy-inhibit signal with a video signal | 57 | 1995 | |
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| 5,146,457 Device for transmitting data words representing a digitalized analog signal and device for receiving the transmitted data words | 171 | 1991 | |
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| 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 | |
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| 4,660,221 System for printing encrypted messages with bar-code representation | 216 | 1983 | |
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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 | 137 | 1993 | |
| 5,432,870 Method and apparatus for compressing and decompressing images of documents | 139 | 1993 | |
| 5,647,010 Image forming apparatus with security feature which prevents copying of specific types of documents | 58 | 1994 | |
| 5,640,467 Image forming apparatus which monitors hardware errors of a controller of a copying-inhibited function | 39 | 1995 | |
| 5,751,854 Original-discrimination system for discriminating special document, and image forming apparatus, image processing apparatus and duplicator using the original-discrimination system | 91 | 1996 | |
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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 | 194 | 1995 | |
| 5,581,800 Method and apparatus for automatically identifying a program including a sound signal | 232 | 1995 | |
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|
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| 5,652,802 Method and apparatus for document identification | 179 | 1994 | |
| 5,790,693 Currency discriminator and authenticator | 201 | 1995 | |
| 5,790,697 Method and apparatus for discriminating and counting documents | 194 | 1995 | |
| 5,822,448 Method and apparatus for currency discrimination | 144 | 1996 | |
| 5,905,810 Automatic currency processing system | 197 | 1997 | |
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| 5,469,222 Non-linear pixel interpolator function for video and graphic processing | 76 | 1993 | |
| 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 | 216 | 1994 | |
| 5,614,940 Method and apparatus for providing broadcast information with indexing | 266 | 1994 | |
| 5,473,631 Simultaneous transmission of data and audio signals by means of perceptual coding | 194 | 1995 | |
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| 2004/0061,326 Document printed with graphical symbols which encode information | 2 | 2003 | |
| 2004/0061,327 Document printed with graphical symbols which encode information | 4 | 2003 | |
| 2004/0075,869 Document printed with graphical symbols which encode information | 24 | 2003 | |
| 2004/0078,333 Document printed with graphical symbols which encode information | 6 | 2003 | |
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| 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 | 375 | 1994 | |
| 5,530,759 Color correct digital watermarking of images | 378 | 1995 | |
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| 4,723,149 Image forming apparatus having a function for checking to copy a secret document | 75 | 1986 | |
| 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 | |
| 6,095,566 Image recorded product, image recording system, image reproducing system, and recording medium for use to superimpose-record/reproduce additional information | 56 | 1997 | |
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|
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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 | 208 | 1994 | |
| 5,574,787 Apparatus and method for comprehensive copy protection for video platforms and unprotected source material | 221 | 1994 | |
| 5,739,864 Apparatus for inserting blanked formatted fingerprint data (source ID, time/date) in to a video signal | 79 | 1994 | |
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|
|||
| 5,428,606 Digital information commodities exchange | 437 | 1993 | |
| 5,539,735 Digital information commodities exchange | 295 | 1994 | |
| 5,613,004 Steganographic method and device | 617 | 1995 | |
| 5,687,236 Steganographic method and device | 413 | 1996 | |
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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 | |
| 5,974,548 Media-independent document security method and apparatus | 167 | 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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| 4,965,827 Authenticator | 136 | 1988 | |
| 4,939,515 Digital signal encoding and decoding apparatus | 253 | 1988 | |
| 5,063,446 Apparatus for transmitting auxiliary signal in a TV channel | 136 | 1989 | |
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|||
| 4,423,415 Non-counterfeitable document system | 190 | 1981 | |
| 4,689,477 Verification system for document substance and content | 88 | 1985 | |
| 4,811,408 Image dissecting document verification system | 163 | 1987 | |
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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 | |
| 5,663,766 Digital data encoding in video signals using data modulated carrier signals at non-peaks in video spectra | 214 | 1996 | |
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| 4,979,210 Method and apparatus for protection of signal copy | 262 | 1988 | |
| 5,073,925 Method and apparatus for the protection of signal copy | 181 | 1990 | |
| 5,513,011 Method and apparatus for recording or reproducing video data on or from storage media | 51 | 1994 | |
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| 4,654,867 Cellular voice and data radiotelephone system | 221 | 1986 | |
| 4,993,068 Unforgeable personal identification system | 707 | 1989 | |
| 5,483,658 Detection of unauthorized use of software applications in processing devices | 102 | 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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| 5,843,564 Copy restrictive documents | 27 | 1997 | |
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| 5,796,824 Storage medium for preventing an irregular use by a third party | 92 | 1996 | |
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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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| 5,671,277 Image forming apparatus and copy management system | 130 | 1994 | |
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| 5,437,897 Anti-counterfeit latent image formation object for bills, credit cards, etc. and method for making the same | 38 | 1993 | |
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| 5,663,952 Checksum generation circuit and method | 72 | 1995 | |
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| 5,337,361 Record with encoded data | 352 | 1992 | |
| 5,471,533 Record with encoded data | 197 | 1994 | |
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| 5,951,055 Security document containing encoded data block | 93 | 1997 | |
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| 5,590,197 Electronic payment system and method | 700 | 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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| 5,524,933 Method for the marking of documents | 138 | 1994 | |
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| 5,432,542 Television receiver location identification | 209 | 1992 | |
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| 5,422,963 Block transform coder for arbitrarily shaped image segments | 122 | 1993 | |
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| 4,943,973 Spread-spectrum identification signal for communications system | 232 | 1989 | |
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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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| 5,178,418 Latent images comprising phase shifted micro printing | 46 | 1991 | |
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| 5,325,167 Record document authentication by microscopic grain structure and method | 160 | 1992 | |
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| 5,568,550 Method and system for identifying documents generated by an unauthorized software copy | 93 | 1994 | |
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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 | 192 | 1994 | |
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| 4,262,329 Security system for data processing | 236 | 1978 | |
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| 5,629,980 System for controlling the distribution and use of digital works | 950 | 1994 | |
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| 5,293,399 Identification system | 110 | 1991 | |
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| 4,588,212 Document of value | 46 | 1984 | |
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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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| 5,034,982 Lenticular security screen production method | 79 | 1989 | |
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| 5,735,547 Anti-photographic/photocopy imaging process and product made by same | 82 | 1997 | |
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|||
| 5,003,590 Encoding an optical video disc to inhibit video tape recording | 64 | 1989 | |
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| 5,410,598 Database usage metering and protection system and method | 567 | 1994 | |
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| 4,590,366 Method of securing simple codes | 171 | 1984 | |
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|||
| 4,918,484 Picture frame number discriminating method and apparatus therefor | 81 | 1988 | |
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|||
| 4,920,503 Computer remote control through a video signal | 110 | 1988 | |
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|||
| 5,430,664 Document counting and batching apparatus with counterfeit detection | 170 | 1993 | |
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| 4,523,508 In-line annular piston fixed bolt regenerative liquid propellant gun | 35 | 1983 | |
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| 6,292,092 Secure personal identification instrument and method for creating same | 106 | 1996 | |
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| 4,644,582 Image registration method | 114 | 1984 | |
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| 5,436,974 Method of encoding confidentiality markings | 28 | 1993 | |
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| 6,185,683 Trusted and secure techniques, systems and methods for item delivery and execution | 550 | 1998 | |
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| 5,772,249 Method of generating a security design with the aid of electronic means | 16 | 1995 | |
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| 5,398,283 Encryption device | 103 | 1993 | |
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| 5,602,920 Combined DCAM and transport demultiplexer | 89 | 1995 | |
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|
|||
| 4,184,700 Documents embossed with optical markings representing genuineness information | 173 | 1978 | |
|
|
|||
| 4,476,468 Secure transaction card and verification system | 153 | 1983 | |
|
|
|||
| 5,367,319 Security protection for important documents and papers | 19 | 1992 | |
|
|
|||
| 4,660,859 Process for incorporating a novel nuclear signature on currency which permits easy authentication at a later date | 19 | 1985 | |
|
|
|||
| 5,557,742 Method and system for detecting intrusion into and misuse of a data processing system | 299 | 1994 | |
|
|
|||
| 6,359,985 Procedure for marking binary coded data sets | 69 | 1998 | |
|
|
|||
| 4,820,912 Method and apparatus for checking the authenticity of documents | 161 | 1986 | |
|
|
|||
| 5,200,822 Arrangement for and method of processing data, especially for identifying and verifying airing of television broadcast programs | 301 | 1991 | |
|
|
|||
| 2002/0114,513 Color image processing device and color image processing method | 1 | 2002 | |
|
|
|||
| 6,024,287 Card recording medium, certifying method and apparatus for the recording medium, forming system for recording medium, enciphering system, decoder therefor, and recording medium | 127 | 1997 | |
|
|
|||
| 4,416,001 Method and apparatus for optically reading digital data inscribed in an arcuate pattern on a data carrier | 68 | 1980 | |
|
|
|||
| 5,280,537 Digital communication system using superposed transmission of high speed and low speed digital signals | 256 | 1992 | |
|
|
|||
| 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 | |
|
|
|||
| 5,166,676 Identification system | 176 | 1990 | |
|
|
|||
| 5,500,856 Transmission de-correlator for eliminating interference in a CDMA communication system | 55 | 1994 | |
|
|
|||
| 5,336,871 Holographic enhancement of card security | 98 | 1992 | |
|
|
|||
| 4,682,794 Secure identification card and system | 133 | 1985 | |
|
|
|||
| 4,855,827 Method of providing identification, other digital data and multiple audio tracks in video systems | 213 | 1987 | |
|
|
|||
| 4,750,173 Method of transmitting audio information and additional information in digital form | 223 | 1986 | |
|
|
|||
| 4,943,093 Security paper for bank notes and the like | 62 | 1988 | |
|
|
|||
| 4,718,106 Survey of radio audience | 185 | 1986 | |
|
|
|||
| 5,077,608 Video effects system able to intersect a 3-D image with a 2-D image | 138 | 1990 | |
|
|
|||
| 4,677,435 Surface texture reading access checking system | 139 | 1985 | |
|
|
|||
| 5,103,459 System and method for generating signal waveforms in a CDMA cellular telephone system | 1484 | 1990 | |
|
|
|||
| 5,319,735 Embedded signalling | 536 | 1991 | |
|
|
|||
| 4,647,974 Station signature system | 162 | 1985 | |
|
|
|||
| 4,811,357 Secondary channel for digital modems using spread spectrum subliminal induced modulation | 174 | 1988 | |
|
|
|||
| 4,776,013 Method and apparatus of encryption of optical images | 136 | 1987 | |
|
|
|||
| 5,825,892 Protecting images with an image watermark | 389 | 1996 | |
|
|
|||
| 5,247,364 Method and apparatus for tuning data channels in a subscription television system having in-band data transmissions | 239 | 1991 | |
|
|
|||
| 5,245,329 Access control system with mechanical keys which store data | 253 | 1989 | |
|
|
|||
| 5,678,155 Anti-counterfeiting device for use in an image-processing apparatus | 43 | 1995 | |
|
|
|||
| 6,301,360 Method of encoding information using a position-based encoding scheme | 58 | 1997 | |
|
|
|||
| 5,606,609 Electronic document verification system and method | 550 | 1994 | |
|
|
|||
| 5,537,223 Rotating non-rotationally symmetrical halftone dots for encoding embedded data in a hyperacuity printer | 102 | 1994 | |
|
|
|||
| 5,689,623 Spread spectrum digital screening | 67 | 1995 | |
|
|
|||
| 4,618,257 Color-sensitive currency verifier | 84 | 1984 | |
|
|
|||
| 4,367,488 Data encoding for television | 206 | 1981 | |
|
|
|||
| 5,349,655 Method for recovery of a computer program infected by a computer virus | 115 | 1992 | |
|
|
|||
| 5,134,496 Bilateral anti-copying device for video systems | 116 | 1989 | |
|
|
|||
| 4,665,431 Apparatus and method for receiving audio signals transmitted as part of a television video signal | 183 | 1982 | |
|
|
|||
| 4,969,041 Embedment of data in a video signal | 303 | 1988 | |
|
|
|||
| 4,379,947 System for transmitting data simultaneously with audio | 239 | 1979 | |
|
|
|||
| 4,866,771 Signaling system | 113 | 1987 | |
|
|
|||
| 5,499,294 Digital camera with apparatus for authentication of images produced from an image file | 415 | 1995 | |
|
|
|||
| 4,835,517 Modem for pseudo noise communication on A.C. lines | 176 | 1984 | |
|
|
|||
| 5,568,179 Method and apparatus for device control by data transmission in TV lines | 77 | 1993 | |
|
|
|||
| 4,963,998 Apparatus for marking a recorded signal | 140 | 1989 | |
|
|
|||
| 4,297,729 Encoding and decoding of digital recordings | 48 | 1978 | |
|
|
|||
| 5,079,648 Marked recorded signals | 187 | 1989 | |
|
|
|||
| 4,571,489 Automatic bank note transaction apparatus | 34 | 1983 | |
|
|
|||
| 4,908,873 Document reproduction security system | 289 | 1983 | |
|
|
|||
| 5,550,932 Method for encoding MICR documents | 34 | 1992 | |
|
|
|||
| 5,638,446 Method for the secure distribution of electronic files in a distributed environment | 222 | 1995 | |
|
|
|||
| 6,141,752 Mechanism for facilitating secure storage and retrieval of information on a smart card by an internet service provider using various network computer client devices | 80 | 1998 | |
|
|
|||
| 6,188,787 Image recognition method and device and copier and scanner employing same | 38 | 1997 | |
|
|
|||
| 5,168,146 Bi-directional snap-action register display mechanism | 35 | 1989 | |
|
|
|||
| 4,908,836 Method and apparatus for decoding multiple bit sequences that are transmitted simultaneously in a single channel | 151 | 1988 | |
|
|
|||
| 4,874,936 Hexagonal, information encoding article, process and system | 242 | 1988 | |
|
|
|||
| 5,774,452 Apparatus and method for encoding and decoding information in audio signals | 291 | 1995 | |
|
|
|||
| 4,972,475 Authenticating pseudo-random code and apparatus | 110 | 1989 | |
|
|
|||
| 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 | 306 | 1995 | |
|
|
|||
| 5,040,059 Method and apparatus of image mensuration with selectively visible and invisible reseau grid marks | 54 | 1989 | |
|
|
|||
| 5,387,941 Data with video transmitter | 185 | 1992 | |
|
|
|||
| 4,663,518 Optical storage identification card and read/write system | 213 | 1985 | |
|
|
|||
| 5,488,664 Method and apparatus for protecting visual information with printed cryptographic watermarks | 139 | 1994 | |
|
|
|||
| 5,613,012 Tokenless identification system for authorization of electronic transactions and electronic transmissions | 535 | 1995 | |
|
|
|||
| 5,982,956 Secure method for duplicating sensitive documents | 110 | 1997 | |
|
|
|||
| 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 | |
| 4,972,476 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 | |
| 5,434,427 Currency verification device | 82 | 1993 | |
| 5,416,307 Currency paper verification and denomination device | 87 | 1993 | |
| 5,446,488 Television programme distribution signal having the capability to selectively block non-programme material | 101 | 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 | |
| 5,838,814 Security check method and apparatus | 95 | 1996 | |
| 2009/0132,648 CONTENT DELIVERY AND GLOBAL TRAFFIC MANAGEMENT NETWORK SYSTEM | 2009 | ||
Patent Citation Ranking
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Jan 26, 2013 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Jan 26, 2017 |
| Fee | Large entity fee | small entity fee | micro entity fee |
|---|---|---|---|
| Surcharge - 7.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| 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 |