| Patents for G11B 7 - Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation, reproducing using an optical beam at lower power; Record carriers therefor (102,715) |
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| 04/10/1991 | CN1012329B Information recording medium disk and its preparing mehtod |
| 04/09/1991 | US5007038 Method and apparatus for producing an accurate error signal in an optical recording medium driver |
| 04/09/1991 | US5007037 Optical disk drive system utilizing electron trapping media for data storage |
| 04/09/1991 | US5006935 Charge latent image recording reproducing system with a uniformly charge detection region providing a reference intensity of a recorded object |
| 04/09/1991 | US5006446 Metal chelate film on substrate |
| 04/09/1991 | US5006387 Information recording medium |
| 04/09/1991 | US5006155 Pyridine derivatives and their use as herbicides |
| 04/09/1991 | US5006058 Apparatus for injection molding information recording disks |
| 04/09/1991 | CA1282863C Synchronous control system |
| 04/04/1991 | WO1991004556A1 Optical tape recorder |
| 04/04/1991 | WO1991004352A1 Sputtering apparatus and sputtering processing system using the same |
| 04/04/1991 | CA2026758A1 Optical data storage medium formed of uv-curable resin and process for the production thereof |
| 04/03/1991 | EP0420696A2 Tracking control circuitry for an optical disk unit |
| 04/03/1991 | EP0420667A2 Phase-synchronous controller for production of reference clock signal in optical disk drive system |
| 04/03/1991 | EP0420659A2 Optical information storage mediums |
| 04/03/1991 | EP0420475A2 Focus capture method for magneto-optic disk drives |
| 04/03/1991 | EP0420383A2 Astigmatism generating device |
| 04/03/1991 | EP0420375A1 Tracking servo system |
| 04/03/1991 | EP0420304A1 Method of manufacturing an optical recording medium |
| 04/03/1991 | EP0420279A2 Optical information recording medium |
| 04/03/1991 | EP0420252A2 Information recording system |
| 04/03/1991 | EP0420250A2 Optical disc apparatus |
| 04/03/1991 | EP0420249A2 Optical disk apparatus having stabilizing function for outputting laser beam |
| 04/03/1991 | EP0420215A2 Apparatus for optically recording information on a recording medium |
| 04/03/1991 | EP0420211A2 Optical disk apparatus |
| 04/03/1991 | EP0420209A2 A recording/reproducing apparatus |
| 04/03/1991 | EP0420206A2 Binary signal detector |
| 04/03/1991 | EP0420179A2 Data recording/reproducing method and device |
| 04/03/1991 | EP0420112A2 Information processor and disk memory used in the same |
| 04/03/1991 | EP0419955A2 Magneto-optical disk storage system with erase and write/read laser device |
| 04/03/1991 | EP0183849B1 Control circuit that operates on pulse-width modulated signals |
| 04/03/1991 | EP0124580B1 Fine and coarse servo system for access and tracking on an optical disk |
| 04/03/1991 | CN1050457A Mothod and device for obtaining record carrier and anticopy means |
| 04/03/1991 | CA2026644A1 Recording data generating method |
| 04/02/1991 | US5005164 Recording and reproducing apparatus |
| 04/02/1991 | US5005163 Level shift circuit of optical disc apparatus |
| 04/02/1991 | US5005162 Optical head devices for use in disc players |
| 04/02/1991 | US5004901 Current mirror amplifier for use in an optical data medium driving apparatus and servo-circuit |
| 04/02/1991 | US5004900 Focusing error detecting apparatus with light switching and detector sampling |
| 04/02/1991 | US5004671 Optical recording medium and optical recording method |
| 04/02/1991 | US5004660 Electroless deposition of metal layer to polysulfone |
| 03/30/1991 | WO1991005336A1 Power-modulated laser devices |
| 03/28/1991 | DE4026664A1 Track following system for optical esp. magneto=optical disc system - allows tracking signals to be combined with offset regulator action |
| 03/27/1991 | EP0419295A2 Optical memory device |
| 03/27/1991 | EP0419257A2 Optical head apparatus incorporating a polarizing element |
| 03/27/1991 | EP0419239A2 Information-recording method and medium |
| 03/27/1991 | EP0419097A2 Objective lens driving devices |
| 03/27/1991 | EP0419027A2 System and method for compensating asymmetric beam energy distribution during focussing |
| 03/27/1991 | EP0418964A1 Record carrier, method of and information recording device for obtaining such record carriers, and information recording device comprising anti-copy means to inhibit unauthorized copying |
| 03/27/1991 | EP0418930A2 Recording medium and reproducing method therefor |
| 03/27/1991 | EP0418897A2 Manufacturing method of high density optical recording medium |
| 03/27/1991 | EP0418879A2 Recording/reproducing system using optical storage medium |
| 03/27/1991 | EP0418858A2 Method of recording/reproducing information for rotary-type information recording/reproducing apparatus |
| 03/27/1991 | EP0418850A2 Information recording and reproducing method |
| 03/27/1991 | EP0418702A2 Disk drive apparatus having improved initialization process |
| 03/27/1991 | EP0418611A2 Optical information recording medium, method and apparatus |
| 03/27/1991 | EP0176601B1 Optical recording medium |
| 03/27/1991 | CN1050280A Information recording medium and adhesive composition therefor |
| 03/27/1991 | CN1050279A Interactive optical disk |
| 03/26/1991 | US5003529 Information recording and reproducing device having bias selecting means |
| 03/26/1991 | US5003528 Data storage media |
| 03/26/1991 | US5003527 System for recording optical discs for use with optical disc playback only devices |
| 03/26/1991 | US5003525 Apparatus for reading a magneto-optical disk |
| 03/26/1991 | US5003524 Optical disk drive with an accurately positioned objective lens |
| 03/26/1991 | US5003523 Apparatus for recording and reproducing information on an optical disk with a focus servo system for avoiding influence of traverse signal during search |
| 03/26/1991 | US5003521 Optical disk discriminating device |
| 03/26/1991 | US5002863 Methine dyes |
| 03/26/1991 | US5002813 Computers, multilayer optical recording device |
| 03/26/1991 | US5002812 Optical information recording medium, information recording method and optical information recording system using the medium |
| 03/26/1991 | US5002706 Magnetic-optical recording disks formed by injection molding |
| 03/26/1991 | US5002622 Glass based optical disc manufacturing process |
| 03/26/1991 | US5002455 Flow processing system |
| 03/21/1991 | WO1991003814A1 Seek circuit of optical disk |
| 03/20/1991 | EP0418100A2 Information reproducing device |
| 03/20/1991 | EP0418087A2 Optical Head |
| 03/20/1991 | EP0418070A2 Information recording and reproducing device |
| 03/20/1991 | EP0418022A2 Optical head control circuit for optical tape recording/reproducing apparatus |
| 03/20/1991 | EP0418017A2 Optical recording medium and method of manufacturing the same |
| 03/20/1991 | EP0417775A2 Molded article for optical use and optical information-storage medium |
| 03/20/1991 | EP0417555A1 Pentamethine dyes and derivatives |
| 03/20/1991 | EP0417277A1 Disk recording/reproducing apparatus and disk recording/reproducing method |
| 03/20/1991 | CN1050105A Method for making optically readable media containing embossed information |
| 03/20/1991 | CN1012115B Optical scanner |
| 03/20/1991 | CN1012114B Expandable suspension for supporting a slider and moving it to the disk in a data recording disk file |
| 03/19/1991 | US5001732 Track counter for optical disk |
| 03/19/1991 | US5001699 Recording method and apparatus |
| 03/19/1991 | US5001698 Read-out information signal processing circuit in an optical recording and reproducing system |
| 03/19/1991 | US5001695 Optical information processing apparatus for stopping tracking and/or focusing controls in an area having preformat signal recorded therein |
| 03/19/1991 | US5001694 Tracking and focus actuator for a holographic optical head |
| 03/19/1991 | US5001693 Radio frequency signal processing circuit which prevents stepwise variations of a DC component |
| 03/19/1991 | US5001692 Optical recording system providing a recording signal waveform adapted to the recording characteristics of the record carrier, and recording apparatus and record carrier for use in such systems |
| 03/19/1991 | US5001691 High density optical storage device |
| 03/19/1991 | US5001690 Tilt servo circuit for an optical disc playback device |
| 03/19/1991 | US5001667 Optical storage device |
| 03/19/1991 | US5001334 Photodetector for hologram-type optical head including means for detecting return light spot deviation |
| 03/19/1991 | US5001333 Method and apparatus for focus error compensation having path length independence |
| 03/19/1991 | US5001209 Non-linear optical active diols and polyurethanes prepared therefrom |
| 03/19/1991 | US5001035 Method of recording information, recording element manufactured according to the method and method of producing a metal matrix |
| 03/19/1991 | US5000834 Facing targets sputtering device |
| 03/19/1991 | CA1281815C Reader/writer apparatus for optical memory card |