| 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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| 06/19/1990 | CA1270559A1 Tracking circuit for an optical information recording and reproducing apparatus |
| 06/15/1990 | CA2005520A1 Near infrared absorbent and display/recording materials prepared by using same |
| 06/15/1990 | CA2004253A1 Optical data storage media and method of preparation |
| 06/14/1990 | WO1990006577A1 Dithering optical data logger |
| 06/14/1990 | WO1990006576A1 Optical recording and/or reproducing apparatus |
| 06/13/1990 | EP0372974A2 Optical disk apparatus |
| 06/13/1990 | EP0372953A2 Method of, and apparatus for detecting access speed for a disc player |
| 06/13/1990 | EP0372650A1 Optical scanning device comprising a focus control system and integrated circuit for use in the focus control system |
| 06/13/1990 | EP0372629A2 Apparatus for optically scanning an information plane |
| 06/13/1990 | EP0372408A2 Radiation-sensitive composition |
| 06/13/1990 | EP0372393A2 Electro-optical polycrystalline barium lanthanum titanium niobate |
| 06/13/1990 | EP0372365A2 Optical pickup apparatus |
| 06/13/1990 | EP0372329A2 Pyridine derivatives and their use as herbicidal agents |
| 06/13/1990 | EP0372051A1 Ternary optical elements and methods |
| 06/13/1990 | CN1043029A 信息记录介质 The information recording medium |
| 06/13/1990 | CN1008407B Optical stores apparatus |
| 06/13/1990 | CA2004994A1 Optical scanning device, mirror objective suitable for use in said device and optical write and/or read apparatus provided with said device |
| 06/13/1990 | CA2004982A1 Optical scanning device, mirror objective suitable for use in said device and optical write and/or read apparatus provided with said device |
| 06/12/1990 | US4933925 Optical tracking control apparatus for controlling a tracking of a light beam which scans an information recording disc using pre-formatted guide tracks having an interrupted signal format |
| 06/12/1990 | US4933924 Optical head and magneto-optical read/write device |
| 06/12/1990 | US4933923 Optical record carrier inscribed with read-out control data and apparatus for reading such record carrier in conformity with such control data |
| 06/12/1990 | US4933922 Apparatus for generating a tracking error signal |
| 06/12/1990 | US4933537 Apparatus for controlling movement of an optical memory card for data transfer therewith |
| 06/12/1990 | US4933243 Recording medium |
| 06/12/1990 | US4933222 Process for producing information recording medium |
| 06/12/1990 | US4933221 Multilayer; chromogenic compound, color former, light absorber |
| 06/12/1990 | CA2003171A1 Compact disc playback enhancer |
| 06/09/1990 | CA2002113A1 Pyridine derivatives and their use as herbicides |
| 06/06/1990 | EP0371880A2 Method and apparatus for controlling and detecting recording laser beam |
| 06/06/1990 | EP0371799A1 Objective lens driving apparatus with a viscoelastic substance |
| 06/06/1990 | EP0371784A2 Optical disk reading system |
| 06/06/1990 | EP0371580A2 Three-dimensional optical memory system |
| 06/06/1990 | EP0371428A2 Information storage medium |
| 06/06/1990 | CN1042787A Circuit device for identifing the type of optical recording medium |
| 06/05/1990 | US4932019 Disk player having a vibration dissipating device |
| 06/05/1990 | US4932017 Method and apparatus for reading and writing information on a recording medium |
| 06/05/1990 | US4932015 Method of reproducing signals from optical disk |
| 06/05/1990 | US4932013 Apparatus for reading an optical disk which controls track jumping accurately and stably |
| 06/05/1990 | US4931628 Apparatus for reproducing optical card data without position indicators |
| 06/05/1990 | US4931337 Containing organic material, adhesive |
| 06/05/1990 | US4931336 Information recording medium and method of optically recording information employing the same |
| 06/05/1990 | US4931313 Transferring curable ink from pad to substrate by pressing; covering reflective layer |
| 06/05/1990 | US4931147 Method of manufacturing a metal matrix |
| 06/05/1990 | US4931138 Method and apparatus for manufacturing optical card |
| 06/05/1990 | CA1270059A1 Method of detecting the position of an optical head |
| 06/05/1990 | CA1269838A1 Optical recording medium, its preparation and its use as a read only memory information carrier |
| 05/31/1990 | WO1990005979A1 Alloys for use in optical recording |
| 05/31/1990 | WO1990005978A1 Single laser direct read after write system (draw) |
| 05/31/1990 | WO1990005977A1 Circuit arrangement for identifying the type of an optical record carrier |
| 05/30/1990 | EP0370655A2 Optical pick-up devices |
| 05/30/1990 | EP0370622A2 Information recording medium |
| 05/30/1990 | EP0370483A2 Information reproducing apparatus |
| 05/30/1990 | EP0370188A1 Transport device and vacuum chamber with such a device and process for loading and unloading a processing chamber |
| 05/30/1990 | EP0370067A1 Preparation of thin layers of iron iii oxide for optical and/or magnetic recording. |
| 05/30/1990 | CN1008224B Recording medium and its fabricating method for optical information |
| 05/29/1990 | US4930116 Record carrier containing information in an optically readable information structure |
| 05/29/1990 | US4930115 Method of and device for recording information, record carrier, and device for reading the recorded information |
| 05/29/1990 | US4930114 Track jump operation control apparatus in a disk player |
| 05/29/1990 | US4929917 Phase-locked loop circuit |
| 05/29/1990 | US4929823 Optical pickup head with holographic servo signal detection using a spot size detection system |
| 05/29/1990 | US4929709 Polycarbonate containing aralkylphenyl end groups |
| 05/29/1990 | US4929485 Information storage medium and method of manufacturing the same |
| 05/29/1990 | US4929067 Method and apparatus for anamorphically shaping and deflecting electromagnetic beams |
| 05/29/1990 | US4929044 Optical pickup using waveguide |
| 05/29/1990 | CA1269796A1 Fluorinated polyacrylates and polyacrylamides having a controlled cross-linking degree, and process for preparing same |
| 05/29/1990 | CA1269753A1 Method and means for parking read/write heads in a disc drive using the back- emf of the spindle motor to operate a stepper motor |
| 05/24/1990 | CA2001152A1 Information recording medium |
| 05/23/1990 | EP0369989A2 Pre-engraved mobile record carrier and optical tracking device therefor |
| 05/23/1990 | EP0369986A2 Autofocus system |
| 05/23/1990 | EP0369794A2 Optical information recording medium and recording/reproducing system |
| 05/23/1990 | EP0369781A2 Process and apparatus for producing substrate sheet for optical recording medium |
| 05/23/1990 | EP0369780A2 Process for producing optical recording medium |
| 05/23/1990 | EP0369735A2 Low profile voice coil actuator for use in an optical data storage device |
| 05/23/1990 | EP0369510A1 Apparatus for optically scanning a radiation-reflecting information plane |
| 05/23/1990 | EP0369432A2 Optical recording medium |
| 05/23/1990 | EP0369422A2 Polycarbonate composition and process for manufacturing the same |
| 05/23/1990 | CN1042440A Apparatus for optically scanning radiation reflecting information plane |
| 05/23/1990 | CN1042426A Optical recording media |
| 05/23/1990 | CN1042425A Optical recording media |
| 05/22/1990 | US4928277 Method and apparatus for driving laser beam source to avoid droop effects |
| 05/22/1990 | US4928187 Method and apparatus for encoding and decoding binary data |
| 05/22/1990 | US4928132 Optical data storage medium |
| 05/22/1990 | US4927735 Reading stability |
| 05/22/1990 | US4927681 Optical information recording medium providing reflected light at two different wavelengths |
| 05/22/1990 | US4927247 Objective lens for optical disk system and optical head using the same |
| 05/22/1990 | US4927235 Movable-member supporting apparatus |
| 05/21/1990 | CA2002855A1 Alloys for use in optical recording |
| 05/17/1990 | DE3838653A1 Conical store of glass for purely magnetic, magnetic-optical or structural-optical data storage and reproduction and process for producing the same |
| 05/16/1990 | EP0368659A2 Optical data recording medium and manufacturing method thereof |
| 05/16/1990 | EP0368585A2 Disk-shaped recording medium and apparatus for recording and/or reproducing data thereon |
| 05/16/1990 | EP0368442A2 Optical information record carrier and the method of producing the same |
| 05/16/1990 | EP0368372A1 Method of producing a metal matrix |
| 05/16/1990 | EP0368242A2 An optical disk apparatus |
| 05/16/1990 | EP0137855B1 Data transfer system using digital disc |
| 05/16/1990 | CN1042259A Optical recording medium and method of its production |
| 05/16/1990 | CA2002995A1 Elimination of monocarbonate from polycarbonate |
| 05/15/1990 | US4926410 Disk |
| 05/15/1990 | US4926409 Optical permitting record/playback from both sides of an optical disk |
| 05/15/1990 | US4926407 Optical data processor |
| 05/15/1990 | US4926406 Disk player |