| 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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| 03/13/1990 | US4908294 Optical information recording medium |
| 03/13/1990 | US4908250 Optical recording medium and production method thereof |
| 03/13/1990 | US4907858 Optical pickup apparatus |
| 03/13/1990 | US4907847 Optical pickup and hologram therefor |
| 03/07/1990 | EP0357464A2 Information recording and reproducing apparatus using optical discs |
| 03/07/1990 | EP0357447A2 Control method for accessing a track of an optical disk in an optical disk apparatus |
| 03/07/1990 | EP0357419A2 Optical data recording and readout apparatus |
| 03/07/1990 | EP0357360A2 Naphthalocyanine derivatives, production thereof and optical recording medium using the same |
| 03/07/1990 | EP0357353A2 Track search apparatus |
| 03/07/1990 | EP0357323A2 Optical pickup device |
| 03/07/1990 | EP0357219A1 Aluminium and aluminium alloy having corrosion-resistant protective layer, and methods of making such a layer |
| 03/07/1990 | EP0357171A2 Optical disc player and method for its manufacture |
| 03/07/1990 | EP0357049A2 Information recording medium and recording/reproducing apparatus using the same |
| 03/07/1990 | EP0356971A1 Tetraazaporphyrins and optical recording medium |
| 03/07/1990 | EP0356811A2 Optical memory disk hub and method for its production |
| 03/07/1990 | EP0356515A1 Optical recording medium, method for producing the same and method for producing an optical recording card provided with the same |
| 03/07/1990 | EP0188460B1 Graphic arts imaging constructions using vapor-deposited layers |
| 03/07/1990 | EP0164131B1 Information recording medium disc and method and apparatus for recording/reproducing information |
| 03/07/1990 | CN1040283A 光盘 CD |
| 03/07/1990 | CN1040282A Reproducing and/or recording apparatus |
| 03/06/1990 | US4907216 Optical record carrier having position indentifying track modulation |
| 03/06/1990 | US4907214 Eccentricity correction apparatus for an optical disk device |
| 03/06/1990 | US4907212 Method and apparatus for calibrating an optical disk system |
| 03/06/1990 | US4907099 Method and apparatus for reproducing an information signal recorded on a rotary recording medium at a high speed |
| 03/06/1990 | US4907098 Information recording-reproducing apparatus |
| 03/06/1990 | US4906923 Speed detecting apparatus including a multi-coil device |
| 03/06/1990 | US4906874 Analog signal switching device for use in an optical memory |
| 03/06/1990 | US4906839 Hybrid surface emitting laser and detector |
| 03/06/1990 | US4906831 For recording information/reading information on/from a storage medium |
| 03/06/1990 | US4906696 Transparent, thermoplastically processable polymer blends made of an aromatic polycarbonate and a methyacrylate polymer |
| 03/06/1990 | US4906675 Active energy ray-curable composition |
| 03/06/1990 | US4906556 Optical recording medium |
| 03/06/1990 | US4906498 Flexible optical recording material in the shape of tape or floppy disk |
| 03/01/1990 | DE3928931A1 Optical data reading system - has monitor to warn of data loss due to dirty head by comparing light intensity from disc with reference |
| 03/01/1990 | DE3928758A1 Optical recording medium for use with laser contg. cyanine dyestuff - and indolizine dyestuff or tri:nuclear merocyanine dyestuff for high reflectivity |
| 03/01/1990 | DE3828822A1 Recording and reproducing process for information carriers |
| 02/28/1990 | EP0356201A2 Optical recording element and driving system |
| 02/28/1990 | EP0356140A2 Optical data recording medium and manufacturing apparatus and method thereof |
| 02/28/1990 | EP0356064A2 Information storage disk |
| 02/28/1990 | EP0355963A2 Optical component-driving device for optical pickup |
| 02/28/1990 | EP0355925A1 A method of making a carrier with optically readable, digitable information |
| 02/28/1990 | EP0355920A2 Electrodynamic actuator for an optical writing and reading assembly |
| 02/28/1990 | EP0355865A2 Reversible optical information-recording medium |
| 02/28/1990 | EP0355642A2 Use of mixtures of thermoplastic polycarbonates and copolymers of styrene with (meth)-acrylic-acid esters as substrates for optical data recorders |
| 02/28/1990 | EP0355620A2 Optical card |
| 02/28/1990 | EP0355589A2 Mold for molding optical disk base |
| 02/28/1990 | EP0355483A2 Optical recording material |
| 02/28/1990 | EP0355121A1 High contraste optical memory tape |
| 02/28/1990 | EP0230466B1 Laser record-player provided with a protection shield |
| 02/28/1990 | EP0139757B1 Apparatus for reproducing data signal |
| 02/27/1990 | US4905216 Method for constructing an optical head by varying a hologram pattern |
| 02/27/1990 | US4905215 System for reading information from two storage layers of an optical disk in different manners |
| 02/27/1990 | US4905214 Method for illuminating adjoining slants of an optical disk having a V-shaped groove |
| 02/27/1990 | US4904856 Optical pickup device with diffraction sensing |
| 02/27/1990 | US4904577 Antimony, tin, indium and additive element, arc reduction during sputtering |
| 02/27/1990 | US4904567 Optical recording member |
| 02/27/1990 | US4904566 Optical recording medium containing an azulenium dye |
| 02/27/1990 | US4904068 Optical device with phase-locked diodelaser array |
| 02/27/1990 | US4904066 Electro-optical devices using liquid crystal polymers |
| 02/27/1990 | US4904062 Collimating lens for use in optical memories |
| 02/22/1990 | WO1990001768A1 Optical head |
| 02/22/1990 | WO1990001480A1 Optical memory |
| 02/22/1990 | DE3828145A1 Apparatus for optical writing/reading to and from optical storage media |
| 02/21/1990 | CN1039920A Optical recording media and information recording and reproducing units |
| 02/21/1990 | CN1039919A The method and circuit compensating failure adjust voltage in the circuit of focus and/or tracing |
| 02/21/1990 | CN1006938B Apparatus for reproducing of optical information |
| 02/20/1990 | US4903256 Card including rotatory system optical recording medium |
| 02/20/1990 | US4903255 Optical recording disc |
| 02/20/1990 | US4903224 Optical information recording disk |
| 02/20/1990 | US4903151 Head positioning system for positioning a multiple head with respect to data and servo trasks of a recording medium |
| 02/20/1990 | US4903140 Apparatus for reproducing signals from both sides of discs |
| 02/20/1990 | US4902746 Use of mixtures of polycarbonates and styrene polymers as substrates for optical storage media |
| 02/20/1990 | US4902114 Objective lens for an optical disk |
| 02/15/1990 | DE3921809A1 Niedermolekulare glasbildende verbindungen und ihre verwendung Low molecular glass-forming compounds and their use |
| 02/15/1990 | DE3827035A1 Optically readable information carrier and its use |
| 02/14/1990 | EP0354834A2 Surface defect inspection apparatus |
| 02/14/1990 | EP0354773A2 Optical disk manufacture |
| 02/14/1990 | EP0354754A2 Method and apparatus for adjusting target position for focusing of light beam |
| 02/14/1990 | EP0354601A2 Optical information recording medium providing reflected light at two different wavelengths, reproducing apparatus and method utilizing the same |
| 02/14/1990 | EP0354570A2 Discontinuous film optical storage media |
| 02/14/1990 | EP0354528A2 Optical recording materials comprising antimony-tin alloys including a third element |
| 02/14/1990 | EP0354499A2 Information storing method |
| 02/14/1990 | EP0354294A2 Carousel-type apparatus for coating substrates |
| 02/13/1990 | US4901325 Semiconductor laser device |
| 02/13/1990 | US4901304 Erasable optical data storage medium having a zoned integral recording layer |
| 02/13/1990 | US4901301 Region detection system for detecting empty sectors on a recording medium |
| 02/13/1990 | US4901300 Method of and apparatus for recording an information signal |
| 02/13/1990 | US4901299 Optical disk reading head controller |
| 02/13/1990 | US4901298 Track pulse controlled address search method for optical disk player |
| 02/13/1990 | US4901297 Optical magnetic recording and reproducing method and apparatus capable of prolonging a recording time |
| 02/13/1990 | US4900910 System for detecting the position of an objective lens |
| 02/13/1990 | US4900649 Pitting and perforating rows with laser beam; adding reflective layer |
| 02/13/1990 | US4900648 Recording, erasing using laser beam, methine dye |
| 02/13/1990 | US4900598 Information storage medium |
| 02/13/1990 | US4900380 Process for producing information recording medium |
| 02/08/1990 | WO1990001206A1 Laser diode driving apparatus |
| 02/07/1990 | EP0354070A2 Optical recording medium and the method of recording, reading, and erasing information using it |
| 02/07/1990 | EP0354028A1 Radiation scanning apparatus |
| 02/07/1990 | EP0354019A2 Optical head device for reading information stored in a recording medium |
| 02/07/1990 | EP0353594A1 Composition and article |