| 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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| 02/07/1990 | EP0353394A2 Optical information recording method and medium |
| 02/07/1990 | EP0353393A2 Optical information recording medium |
| 02/07/1990 | EP0353392A2 Optical information recording medium |
| 02/07/1990 | EP0353391A2 Optical information recording medium |
| 02/06/1990 | US4899359 Optical memory semiconductor laser apparatus |
| 02/06/1990 | US4899329 Optically readable disc with a centering member fixed to a transparent substrate |
| 02/06/1990 | US4899328 Data reproducing apparatus and method for locking a reproducing head |
| 02/06/1990 | US4899327 Focus servo loop correction |
| 02/06/1990 | US4899325 Fine access method and circuit for an optical disk drive using a multi-track jump |
| 02/06/1990 | US4899168 Optical recording medium |
| 02/06/1990 | EP0357614A4 Read-only optical card and system. |
| 02/06/1990 | EP0316341A4 Method and apparatus for reading data with ccd area arrays. |
| 02/06/1990 | CA1265394A1 Free surface casting method |
| 02/01/1990 | DE3901988A1 Erasable optical fluorescence and absorption data medium having good long-term stability |
| 02/01/1990 | DE3825590A1 Master for optical storage media |
| 01/31/1990 | EP0353078A2 Optical disk drive system |
| 01/31/1990 | EP0353007A2 Polymethine dyes suitable for optical recording media |
| 01/31/1990 | EP0352333A1 Data recording medium |
| 01/31/1990 | CN1039319A Method of optically scanning information plane and optical record carriers and scanning apparatuses |
| 01/31/1990 | CN1039318A Optical recording media and process for preparing same |
| 01/30/1990 | US4897829 Cardlike optical recording medium |
| 01/30/1990 | US4897828 Optical pickup device |
| 01/30/1990 | US4897827 Video disc player with rapid track access means |
| 01/30/1990 | US4897228 Method for producing optical disk base |
| 01/30/1990 | CA1265296A1 Fluorinated polymers and resins prepared therefrom |
| 01/25/1990 | WO1990000797A1 Process and circuit arrangement for compensating offset voltages in a focus and/or track-regulating circuit |
| 01/25/1990 | DE3824889A1 Optical recording carrier |
| 01/25/1990 | DE3803982A1 Data carrier with duplication prevention |
| 01/24/1990 | EP0352194A1 Methods, apparatus and media for recording information |
| 01/24/1990 | EP0352131A2 Track jump controlling apparatus for an optical disc pickup |
| 01/24/1990 | EP0352125A2 A semiconductor laser driving apparatus |
| 01/24/1990 | EP0352105A2 Optical disc medium |
| 01/24/1990 | EP0352104A2 Magneto-optical memory apparatus and optical memory apparatus |
| 01/24/1990 | EP0351953A2 Optical head with a tilt correction servo mechanism |
| 01/24/1990 | EP0351875A2 Composition for the preparation of a near IR absorbing material and molded articles containing this composition or this material |
| 01/24/1990 | EP0351675A2 Focusing error detecting apparatus |
| 01/24/1990 | EP0351422A1 Devices for producing microfilm and microfiche records |
| 01/24/1990 | EP0181941B1 Optical recording medium |
| 01/23/1990 | US4896314 Bump-forming media including thin intermediate reflective layer and methods for writing, reading, and erasing same |
| 01/23/1990 | US4896313 Optical information recording medium utilizing pits having a sharp front face and method of manufacturing the same |
| 01/23/1990 | US4896311 Disk apparatus |
| 01/23/1990 | US4896310 Light beam control arrangements for optical disc apparatus |
| 01/23/1990 | US4896309 Optical disc player with phase shift dependent on disk rotation direction |
| 01/23/1990 | US4896292 Apparatus for the reversible, optical storage of data |
| 01/23/1990 | US4896221 Optical disc reproducing apparatus having speed-change reproduction mode |
| 01/23/1990 | US4896027 Portable detachable data record |
| 01/23/1990 | US4896025 Information reproducing apparatus for information recording medium having a plurality of information tracks |
| 01/23/1990 | CA1264852A1 Optical memory element |
| 01/18/1990 | DE3828050A1 Holographic optical component |
| 01/18/1990 | DE3823496A1 Novel crown compounds and their use |
| 01/17/1990 | EP0352068A2 Optical data recording medium |
| 01/17/1990 | EP0351032A2 Optical disk player |
| 01/17/1990 | EP0350939A1 Method and switching arrangement for the compensation of offset voltages in a focus and/or track-following circuit |
| 01/17/1990 | CN1038895A 光记录介质和光记录法 Optical recording medium and an optical recording method |
| 01/16/1990 | US4894817 Method of writing data on optical card by projecting thereon intensity modulated light beam |
| 01/16/1990 | US4894816 Optical information recording apparatus |
| 01/16/1990 | US4894814 Optical disc player with pause function in response to elapsed preset maximum playback time period |
| 01/16/1990 | US4894525 Optical power control device for semiconductor light emitting element |
| 01/16/1990 | US4894260 Electroless plating method and apparatus |
| 01/16/1990 | US4894110 Identification card with a visible authenticity feature |
| 01/11/1990 | WO1990000299A1 Optical recording medium and a method of producing the same |
| 01/11/1990 | DE3921982A1 Protective circuit for optical disc players |
| 01/10/1990 | EP0350336A2 Optical memory system |
| 01/10/1990 | EP0350225A2 Optical head apparatus |
| 01/10/1990 | EP0350144A2 Height adjusting device for a pick-up |
| 01/10/1990 | EP0350113A1 Liquid crystalline polyesters |
| 01/10/1990 | EP0350112A1 Polyurethanes prepared from non-linear optical active diols |
| 01/10/1990 | EP0350078A1 Optical information carrier and optical cards |
| 01/10/1990 | EP0349857A2 Use of mixtures of thermoplastic polycarbonates and copolymers of styrene with methacrylonitrile as substrates for optical-recording material |
| 01/10/1990 | EP0349731A2 Optical modulation device using polymer liquid crystal |
| 01/09/1990 | US4893299 Magneto-optic data storage technique |
| 01/09/1990 | US4893298 Record-carrier body provided with a relief structure of optically detectable servo-track portions and sector addresses and apparatus for forming said structure |
| 01/09/1990 | US4893297 Disc-shaped member |
| 01/09/1990 | US4893296 Optical pickup device |
| 01/09/1990 | US4893193 Disc recording medium and apparatus for playback thereof |
| 01/09/1990 | US4892692 Polycarbonates |
| 01/09/1990 | US4892606 Optical recording medium having space therein and method of manufacturing the same |
| 01/09/1990 | US4892451 Apparatus for the quasi-continuous treatment of substrates |
| 01/03/1990 | EP0349439A2 System for obtaining optimum focusing position in optical disc system |
| 01/03/1990 | EP0348982A2 Apparatus for detecting surface potential distribution |
| 01/03/1990 | EP0348955A2 Optical disk recording and reading system with management data access mechanism |
| 01/03/1990 | EP0348950A2 Hybrid surface emitting laser and detector |
| 01/03/1990 | EP0348949A2 Disc control apparatus |
| 01/03/1990 | EP0348845A2 An objective lens supporting mechanism for use in an objective lens actuator of an optical head |
| 01/03/1990 | CN1038534A 全电子气体流量计 Full electronic gas meter |
| 01/02/1990 | US4891816 Integrated semiconductor laser device |
| 01/02/1990 | US4891800 Optical recording disc |
| 01/02/1990 | US4891799 Optical head apparatus for writing and reading data on an optical disk having a lens with an inclined optical axis |
| 01/02/1990 | US4891798 Optical disc player with focus control for preventing erroneous focus on outer surface of optical disc |
| 01/02/1990 | US4891513 Photosensor block having an adjustable mounting structure to permit fine positioning of the photosensor block included in the photosensor block |
| 01/02/1990 | US4891305 Optical information recording element |
| 01/02/1990 | US4890905 Replica lens and method of manufacturing same |
| 12/28/1989 | WO1989012888A1 Optical card having a light-absorbing layer |
| 12/28/1989 | WO1989012860A1 Method and apparatus for storing midi information in subcode packs |
| 12/27/1989 | EP0348233A2 Feedback control apparatus in an optical recording and reproducing device |
| 12/27/1989 | EP0348221A2 An optical pickup apparatus |
| 12/27/1989 | EP0348197A2 Linear motor locking mechanism in a disc unit |
| 12/27/1989 | EP0348122A2 Optical data recording medium and manufacturing method thereof |
| 12/27/1989 | EP0347858A2 Optical disc and recording and reproducing apparatus employing the optical disc |
| 12/27/1989 | EP0347801A2 Optical recording media and information recording and reproducing units |