| 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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| 09/18/1990 | US4958245 Apparatus and method for optical servo control with media having information storage and servo control regions of different reflectivities |
| 09/18/1990 | US4958234 Distortion eliminating circuit |
| 09/18/1990 | US4957990 Materials for optical use |
| 09/18/1990 | US4957854 Optical recording medium |
| 09/18/1990 | US4957851 Image recording medium comprising a diacetylene derivative compound film and a radiation absorbing layer |
| 09/18/1990 | US4957776 Method of manufacturing optical disc |
| 09/18/1990 | US4957604 Corrosion resistance, magneto-optical recording media |
| 09/18/1990 | US4957603 Optical memory disc manufacture |
| 09/18/1990 | US4957580 Method for making an optical data card |
| 09/18/1990 | CA1274273A1 Method of pulse-mode driving of a semi-conductor laser, driving device for a semi-conductor laser and laser-writing apparatus provided with such a driving device |
| 09/13/1990 | DE4006275A1 Objektivlinsensystem einer aufzeichnungs/wiedergabe-vorrichtung fuer optische information Objective lens system of a recording / reproducing apparatus for an optical information |
| 09/12/1990 | EP0387224A2 Position servo system and its method of operation |
| 09/12/1990 | EP0387059A2 Process of aligning liquid crystal media |
| 09/12/1990 | EP0387050A2 Magneto-optical disk inspecting method and apparatus |
| 09/12/1990 | EP0387037A2 Process for preparing optical recording medium using a forming roll for a substrate |
| 09/12/1990 | EP0387019A2 Beam track position control apparatus for optical disk apparatus |
| 09/12/1990 | EP0387018A2 Track access control method and apparatus for optical disk apparatus |
| 09/12/1990 | EP0387016A2 Optical recording media |
| 09/12/1990 | EP0386971A1 Method of producing optical disk, jig for carrying out the method, and optical disk produced by the method |
| 09/12/1990 | EP0386705A1 Optical card processing apparatus |
| 09/12/1990 | EP0260327B1 Optical memorization device |
| 09/12/1990 | EP0211912B1 Focus regulation for an apparatus for disc-shaped rotating information supports |
| 09/11/1990 | US4956833 Objective driving device for an optical disk apparatus |
| 09/11/1990 | US4956832 Tracking-deviation detector apparatus capable of preventing overwriting of data on an adjacent track |
| 09/11/1990 | US4956813 Apparatus for regenerating information from records made by optical-wavelength-multiplexing method |
| 09/11/1990 | US4956812 Wavelength selective optical recording and reproducing device |
| 09/11/1990 | US4956735 Actuator magnetic circuit |
| 09/11/1990 | US4956243 Optical memory element |
| 09/11/1990 | US4956216 Optical recording medium |
| 09/11/1990 | US4956215 Optical recording card and method of producing the same |
| 09/11/1990 | US4956214 Information recording medium, production process and molding die for substrate therefor |
| 09/11/1990 | US4956213 Ultrasonic or thermal welding |
| 09/11/1990 | CA1274016A1 Optical disk duplicating apparatus and duplicated optical disk |
| 09/07/1990 | WO1990010290A1 Circuit arrangement for reversing a magnetic field |
| 09/07/1990 | CA2011590A1 Optical recording media |
| 09/05/1990 | EP0385701A2 Apparatus for reproducing information from an opto-magnetic recording medium |
| 09/05/1990 | EP0385609A1 Optical head for optical information recording/reproducing apparatus |
| 09/05/1990 | EP0385537A2 Method of determining the monitor sensitivity of, and method and system for controlling a radiation emitting arrangement, and optical recording and/or reproducing apparatus including such a system |
| 09/05/1990 | EP0385500A2 Optical head |
| 09/05/1990 | EP0385498A2 Recording and reproducing apparatus for optical disk |
| 09/05/1990 | EP0385457A2 High surface hardness transparent resin and polymerizable monomer |
| 09/05/1990 | EP0385456A2 High surface hardness transparent resin and polymerizable monomer |
| 09/05/1990 | EP0385344A2 Optical storage media |
| 09/05/1990 | EP0385341A2 Optical recording medium |
| 09/05/1990 | EP0385337A2 Method for reproducing information which is recorded in thin polymer films |
| 09/05/1990 | EP0385109A2 Shaped article for optical uses |
| 09/05/1990 | CN1009507B Liquid crystal disc memory |
| 09/04/1990 | WO1990010916A2 Erasable optical wallet-size data card |
| 09/04/1990 | US4955011 Information recording/reproducing apparatus with control device for maintaining head velocity below a critical velocity |
| 09/04/1990 | US4955009 Optical disk drive apparatus having counter disable at seek start-up |
| 09/04/1990 | US4955008 Prewritten data storage medium and optical scanning device therefor |
| 09/04/1990 | US4954905 Data transducer position control system for disk storage drive system |
| 09/04/1990 | US4954904 Method and apparatus for preventing head crashes in a disk system |
| 09/04/1990 | US4954841 Transparent resin, adhesive, and protective coating |
| 09/04/1990 | US4954723 Disk surface inspection method and apparatus therefor |
| 09/04/1990 | US4954702 Process for detecting a focal point in an optical head |
| 09/04/1990 | US4954422 Recording material containing a layer of polymer particles and a superimposed metallic layer |
| 09/04/1990 | US4954420 Metal-containing indoaniline compound and optical recording medium employing the compound |
| 09/04/1990 | US4954380 Data recording and tracking segments |
| 09/04/1990 | US4954379 Germanium, telurium alloy |
| 09/04/1990 | US4954065 Master disk |
| 09/04/1990 | US4953959 Objective lens for optical disks |
| 09/04/1990 | US4953385 Information storage stamper and method of manufacturing disks using the same |
| 09/04/1990 | CA1273717A1 Position sensitive radiation detector |
| 09/02/1990 | CA2011243A1 Reading out information stored in thin polymer layers |
| 09/01/1990 | CA2011075A1 High surface hardness transparent resin and polymerizable monomer |
| 09/01/1990 | CA2011074A1 High surface hardness transparent resin and polymerizable monomer |
| 08/29/1990 | EP0384665A2 Optical recording medium |
| 08/29/1990 | EP0384405A2 Optical recording and reproducing apparatus |
| 08/29/1990 | EP0384358A2 Optical recording and playback system of dual light source type |
| 08/29/1990 | EP0384274A2 Manufacturing method of a multi-layered identification card |
| 08/29/1990 | EP0384041A1 Process for the production of a heat-mode recording material |
| 08/29/1990 | CN1009402B Optical thermo method for recording sensing and erasing |
| 08/28/1990 | US4953154 Pickup transport device for optical disc apparatus |
| 08/28/1990 | US4953152 Mastering machine for making an on-land recording master disk with two beam alignment servo loops |
| 08/28/1990 | US4953151 Apparatus for detecting whether information is recorded on a storage device |
| 08/28/1990 | US4953150 Optical recording apparatus having improved erasing capability |
| 08/28/1990 | US4953122 Pseudo-erasable and rewritable write-once optical disk memory system |
| 08/28/1990 | US4952787 Method and apparatus for detecting focus error using pits and light beams having astigmatism |
| 08/28/1990 | US4952786 Information recording and reproducing apparatus having switching means for disabling control of medium drive by a phase locked loop in a playback mode |
| 08/28/1990 | US4952014 Optical systems with thin film polarization rotators and method for fabricating such rotators |
| 08/27/1990 | CA2010788A1 Method of determining the monitor sensitivity of, and method and system for controlling a radiation emitting arrangement, and optical recording and/or reproducing apparatus including such a system |
| 08/23/1990 | WO1990009661A1 Erasable optical information storage system |
| 08/23/1990 | WO1990009356A1 High energy sensitive photochromic glasses and method for making |
| 08/23/1990 | DE4005315A1 Optical information recording medium - has two recording layers with common metallic element |
| 08/22/1990 | EP0383682A1 Objective lens moving apparatus |
| 08/22/1990 | EP0383562A1 Optical information recording and/or reproducing apparatus with device for prohibiting movement of optical head |
| 08/22/1990 | EP0383451A1 Optical disc recording and reproducing apparatus |
| 08/22/1990 | EP0383377A1 Arrangement for reproducing an electric signal |
| 08/22/1990 | EP0383299A2 Optical disk recording/reproducing apparatus and its disk rotary driving apparatus |
| 08/22/1990 | EP0383237A2 Recording/reproducing apparatus of optical card |
| 08/22/1990 | EP0382713A1 Optical memory card with versatile storage medium |
| 08/22/1990 | CN1009315B Optical modulation system |
| 08/22/1990 | CA2010317A1 Optical head for optical information recording/reproducing apparatus |
| 08/21/1990 | US4951277 Optical disk player |
| 08/21/1990 | US4951275 Apparatus for tracking optical disk |
| 08/21/1990 | US4951274 Magneto-optical head capable of separating beams for reading recorded information and servo information by use of one optical element |
| 08/21/1990 | US4951273 Optical recording and reproducing device with normalization of servo control signal using switchable automatic gain control circuitry |
| 08/21/1990 | US4951272 System and method for accessing tracks for optical disc apparatus |
| 08/21/1990 | US4951154 Magneto-optic recording/reproducing apparatus |