| 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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| 02/15/1989 | EP0303355A2 Improvements relating to holograms and diffraction gratings |
| 02/15/1989 | EP0303209A2 Flat multiplayered laser-optical recording material |
| 02/15/1989 | EP0303086A2 Method of making a substrate for a magneto-optical recording layer, injection-moulding apparatus for making a substrate as well as substrate for a magneto-optical recording layer |
| 02/14/1989 | US4805164 Disc inclination detecting apparatus |
| 02/14/1989 | US4805163 Tracking control unit in information reproducing apparatus |
| 02/14/1989 | US4805162 Fine and coarse servo system for access and tracking on an optical disk |
| 02/14/1989 | US4805145 Method for recording and reproducing information |
| 02/14/1989 | US4805144 Solid memory medium and information reproduction system using the medium |
| 02/14/1989 | US4805050 Disk player information selecting apparatus |
| 02/14/1989 | US4804835 Optical head having guide means with first and second polarizing surfaces |
| 02/14/1989 | US4804613 Optical recording medium and optical recording process using such medium |
| 02/14/1989 | CA1249955A1 Coated substrate |
| 02/09/1989 | WO1989001223A1 Track-jump device for a disc device |
| 02/09/1989 | WO1989001222A1 Optical recording medium |
| 02/09/1989 | WO1989001220A1 Reversible infra-red recording medium |
| 02/08/1989 | EP0302666A2 Optical information processing apparatus provided with means for holding an optical system in a predetermined position when abnormality occurs to tracking or focusing control |
| 02/08/1989 | EP0302526A2 Image forming method and recording medium |
| 02/08/1989 | EP0302516A2 Optical article made of amorphous thermoplastic polyester resin |
| 02/08/1989 | EP0302507A2 Optical card recording/playing back apparatus |
| 02/08/1989 | EP0302497A2 Data recording medium |
| 02/08/1989 | EP0302138A1 Method of locating on a record disc a track, containing information, selected as target |
| 02/08/1989 | EP0302119A1 Method for recording and reproducing data for an optical card |
| 02/08/1989 | CN1030995A Method for manufacture of information recording disk |
| 02/08/1989 | CN1030994A Process for producing magnetic hub |
| 02/08/1989 | CN1030993A Record disk for information |
| 02/08/1989 | CN1030987A Apparatus for optically scanning information plane |
| 02/08/1989 | CN1030922A Resin composition for spacers of information recording disc |
| 02/07/1989 | US4803677 Rotary recording medium having a guide track and recording and reproducing apparatus therefor |
| 02/07/1989 | US4803676 Circuitry for an audio or video disk player |
| 02/07/1989 | US4803675 High speed, low power consumption pickup head position control device in an optical type disc reproducing device |
| 02/07/1989 | US4803660 Optical recording medium |
| 02/07/1989 | US4803579 Magneto-optical information reproducing apparatus in which divided reproducing lights are differentially detected by a photodetector having no amplifying action through an analyzer whose transmission axis azimuth is optimized |
| 02/07/1989 | US4803287 Certain photochromic fulgide compounds and method for their synthesis |
| 02/07/1989 | US4802736 Interferometers |
| 02/07/1989 | CA1249884A1 Disc-shaped information carrier and method of manufacturing it |
| 02/07/1989 | CA1249744A1 Optical pickup having a driving unit |
| 02/02/1989 | DE3822388A1 Plattenfoermiges aufzeichnungsmedium mit festwertspeicher-spuren, beschreibbaren bereichen und mit antriebseinrichtung Plattenfoermiges recording medium with a fixed value memory-traces, writable areas and with power supply device |
| 02/02/1989 | DE3723522A1 Device for reversible optical data storage and its application |
| 02/01/1989 | EP0301909A2 Apparatus for rapidly accessing a large data base |
| 02/01/1989 | EP0301866A2 Process for producing magnetic hub |
| 02/01/1989 | EP0301865A2 Optical recording apparatus and optical disc |
| 02/01/1989 | EP0301832A1 Process for producing information recording discs |
| 02/01/1989 | EP0301831A2 Information recording discs and process for producing same |
| 02/01/1989 | EP0301830A2 Resin composition for spacers of information recording disc |
| 02/01/1989 | EP0301829A1 Information recording discs |
| 02/01/1989 | EP0301793A2 Optical pickup element |
| 02/01/1989 | EP0301792A2 An optical pickup device |
| 02/01/1989 | EP0301791A2 Light beam control arrangements for optical disc apparatus |
| 02/01/1989 | EP0301650A2 Process for the manufacture and back-coating of a galvanic shell |
| 02/01/1989 | EP0301644A2 Track seeking using sampled information |
| 02/01/1989 | EP0301643A2 Focus servo circuit in an optical disk system |
| 02/01/1989 | EP0301641A1 Master disc and method of manufacturing a matrix |
| 02/01/1989 | EP0301537A2 Optical card recording/reproducing apparatus |
| 02/01/1989 | EP0301405A2 Flat multilayered laser-optical recording material |
| 02/01/1989 | EP0301108A1 Data recording/reproducing apparatus for optical card |
| 02/01/1989 | CN1030840A 光盘 CD |
| 01/31/1989 | US4802160 Optical disk substrate |
| 01/31/1989 | US4802159 Information recording disc and information signal recording apparatus therefor |
| 01/31/1989 | US4802156 Cutting machine for pits on CD master |
| 01/31/1989 | US4802154 High density codes for optical recording |
| 01/31/1989 | US4802153 Optical information processor and method for accessing rotating record carrier utilizing acousto-optic light deflector including holding a focus error signal during track jumping |
| 01/31/1989 | US4802152 Compact disc drive apparatus having an interface for transferring data and commands to and from a host controller |
| 01/31/1989 | US4801794 Data detection and optical focus error detection system for rotating optical media |
| 01/31/1989 | US4801499 Optical recording medium |
| 01/31/1989 | US4801184 Integrated optical read/write head and apparatus incorporating same |
| 01/31/1989 | CA1249659A1 Optical disc having servo-track portions and sector addresses and apparatus |
| 01/31/1989 | CA1249467A1 Light waveguide with a submicron aperture, method for manufacturing the waveguide and application of the waveguide in an optical memory |
| 01/26/1989 | WO1989000749A1 Apparatus for writing/reading data on an optical recording medium |
| 01/26/1989 | WO1989000748A1 Digital storage |
| 01/26/1989 | WO1989000742A1 Erasable optical wallet-size data card |
| 01/25/1989 | EP0300820A2 Optical head |
| 01/25/1989 | EP0300800A1 Macrocyclic tetramers having columnar tridimensional mesophases |
| 01/25/1989 | EP0300733A1 Optical recording medium, process for preparing the same and its optical recording and reproducing system |
| 01/25/1989 | EP0300581A2 Amorphous pip protection apparatus for use in an optical recording apparatus |
| 01/25/1989 | EP0300570A1 Apparatus for optically scanning an information plane |
| 01/25/1989 | EP0300481A2 Apparatus for detecting inclination of optical card |
| 01/25/1989 | EP0300457A2 Data storage system capable of forming sector-to-sector separation sections |
| 01/24/1989 | US4800551 Method and apparatus for feeding card |
| 01/24/1989 | US4800550 Multi-format optical disk recording/reproducing system |
| 01/24/1989 | US4800549 Method and apparatus for seeking target address with error check code |
| 01/24/1989 | US4800548 Optical recording and reproducing apparatus with abnormality detector |
| 01/24/1989 | US4800547 Optical record carrier scanning apparatus with scanning beam focus error detection |
| 01/24/1989 | US4800546 Optical information record/regenerating apparatus with device for prohibiting movement of optical head |
| 01/24/1989 | US4800446 Video disk recorded with video and digital data and recording/reproducing apparatus therefor |
| 01/24/1989 | US4799766 Objective lens support and positioning system |
| 01/24/1989 | US4799746 Efficient holograms and method for making same |
| 01/24/1989 | EP0231351A4 Dual stripe optical data card. |
| 01/18/1989 | EP0299742A2 Optical disk |
| 01/18/1989 | EP0299573A1 System for recording and/or reading an information signal, record carrier and recording and/or read apparatus for use in such a system, and method of and apparatus for manufacturing such a record carrier |
| 01/18/1989 | EP0299412A2 Apparatus for regenerating information from records made by optical-wavelength-multi-plexing method |
| 01/18/1989 | EP0299335A1 Optical recording and reproducing apparatus |
| 01/18/1989 | EP0299073A1 Optical recording medium and production thereof |
| 01/18/1989 | EP0133790B1 Disc playback apparatus |
| 01/18/1989 | CN1030493A 光学记录介质 The optical recording medium |
| 01/17/1989 | US4799229 Semiconductor laser array |
| 01/17/1989 | US4799210 Fiber optic read/write head for an optical disk memory system |
| 01/17/1989 | US4799208 Optical recording and reproducing apparatus having erasing function with controllable erasing beam |
| 01/17/1989 | US4799207 Apparatus and method for maintaining progression of recovery of recorded information |
| 01/17/1989 | US4799206 Tracking control apparatus for recording disc reproducing apparatus |
| 01/17/1989 | US4798785 Recording elements comprising write-once thin film alloy layers |