AMPEX CORPORATION

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
G11B INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER 31107
 
  
 
H04N PICTORIAL COMMUNICATION, e.g. TELEVISION 9233
 
  
 
G06F ELECTRIC DIGITAL DATA PROCESSING 6441
 
  
 
H03M CODING, DECODING OR CODE CONVERSION, IN GENERAL 4107
 
  
 
G06T IMAGE DATA PROCESSING OR GENERATION, IN GENERAL 3132
 
  
 
H04L TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION 3282
 
  
 
G05B CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS 299
 
  
 
G06K RECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS 2196
 
  
 
E05C BOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS OR WINDOWS 135
 
  
 
F16C SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OF CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS 169

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
5872667 Mechanical operations and volume format identifying system zones for tape mediaAug 07, 97Feb 16, 99[G11B]
5836533 Hybrid arm-position/tape-tension servocontrol systemOct 31, 96Nov 17, 98[G11B]
5774311 Small core magnetic head with non-magnetic side supportMar 24, 97Jun 30, 98[G11B]
5757575 Track-curvature detection using clock phase shift in azimuth recordingOct 31, 96May 26, 98[G11B]
5748192 Video special effects system with graphical operator interfaceNov 04, 96May 05, 98[G06T]
5742295 Video special effects system with graphical operator interfaceNov 04, 96Apr 21, 98[G06T]
5729400 Data recorder using still framing techniques for information retrieval and methodJul 20, 95Mar 17, 98[G11B]
5729413 Two-gap magnetic read/write headDec 20, 95Mar 17, 98[G11B]
5721475 Extended-resolution pulse-width modulation servomotor driveOct 31, 96Feb 24, 98[G05B]
5717552 Magnetic core with field confinement structureSep 10, 96Feb 10, 98[G11B]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2010/0090,380 Vibration IsolationAbandonedMar 20, 08Apr 15, 10[F16F]
6724826 Method and apparatus for improving the image quality of transmitted video signals via pre-filteringExpiredFeb 25, 00Apr 20, 04[H04B]
6457928 Inter-row transfer unit for moving tape cartridges between rows of library systemsExpiredAug 04, 99Oct 01, 02[B65G]
6438623 Transfer unit extending between two or more cabinets for expansion of tape library systemsExpiredApr 16, 99Aug 20, 02[G06F]
6124993 Digital servo track format with leading and trailing identifiersExpiredMay 20, 94Sep 26, 00[G11B]
6111718 Electronic record/play switch with low noise low input impedance preamplifierExpiredJun 08, 98Aug 29, 00[G11B]
6082653 System for estimating tape pack radius using a Kalman filterExpiredOct 31, 96Jul 04, 00[G11B]
6081401 Step gap head tracking servoExpiredDec 23, 97Jun 27, 00[G11B]
6076142 User configurable raid system with multiple data bus segments and removable electrical bridgesExpiredApr 15, 97Jun 13, 00[G06F]
6043947 Magnetic storage and reproducing system with a low permeability keeper and a self-biased magnetoresitive reproduce headExpiredJul 10, 98Mar 28, 00[G11B]
6023396 Magnetic head tip design to reduce dynamic spacing loss and improve signal quality in high-density helical scanning systemExpiredDec 23, 97Feb 08, 00[G11B]
5930398 Method and apparatus for determining a quantizing factor for multi-generation data compression/decompression processesExpiredDec 30, 96Jul 27, 99[G06K]
5870260 Magnetic recording system having a saturable layer and detection using MR elementExpiredMay 23, 97Feb 09, 99[G11B]
5861220 Method and apparatus for providing a magnetic storage and reproducing media with a keeper layer having a longitudinal anisotropyExpiredAug 06, 96Jan 19, 99[G11B]
5843565 Particulate magnetic medium utilizing keeper technology and methods of manufactureExpiredOct 31, 96Dec 01, 98[G11B, B32B]
5830590 Magnetic storage and reproducing system with a low permeability keeper and a self-biased magnetoresistive reproduce headExpiredJun 28, 96Nov 03, 98[G11B]
5826326 Method for manufacturing a composite metal and ferrite head transducerExpiredJun 07, 95Oct 27, 98[H01F]
D344713 Professional digital video cassette recorderExpiredDec 19, 91Mar 01, 94[]
5285037 Illuminated dome switchExpiredApr 10, 92Feb 08, 94[H01H]
5248112 Tape transport control system with a feedforward capstan drive to the reel motorsExpiredMar 08, 90Sep 28, 93[G11B]

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