| 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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| 04/27/1993 | US5206850 Optically writable record of digital information and recording apparatus therefor |
| 04/27/1993 | US5206849 Object lens holder and driving device |
| 04/27/1993 | US5206848 Optical disk player having tilt servo control absent tilt sensor |
| 04/27/1993 | US5206847 Information recording disk, and information recording/reproducing method and apparatus utilizing the same |
| 04/27/1993 | US5206846 Signal detector having a virtual division |
| 04/27/1993 | US5206762 Viscoelastic substance and objective lens driving apparatus with the same |
| 04/27/1993 | US5206566 Access method of actuator and control apparatus therefor |
| 04/27/1993 | US5206306 Ring opening polymerization of methyltetracyclododecane and dicyclopentadiene |
| 04/27/1993 | US5206114 Information storage medium containing a recording layer capable of exhibiting a dual phase state |
| 04/27/1993 | US5206063 Optical recording element with rom and recording regions |
| 04/27/1993 | US5205918 Apparatus having a vacuum chamber |
| 04/27/1993 | US5205178 Method for non-intrusive continuous and automatic taking of samples, storing and supplying of samples and data for a possible evaluation |
| 04/26/1993 | CA2079620A1 Holographic elements for an optical recording system |
| 04/23/1993 | CA2081072A1 Inclination adjusting device for an objective lens for an optical information recording and reproduction apparatus |
| 04/22/1993 | DE4235348A1 Recording and playback system for optical recording tape - has separate heads with surface scanned by laser providing reflected signal dependent upon thermal energy effect |
| 04/22/1993 | DE4235237A1 Focal control system for CD player - differentiates recorded signal envelope form and uses as component in controlling beam focussing |
| 04/21/1993 | EP0538025A2 Disk drive |
| 04/21/1993 | EP0537953A2 Metal mould device and a method to mould a disc substrate |
| 04/21/1993 | EP0537904A2 Optical disk drive |
| 04/21/1993 | EP0537801A2 Data recording and reproducing apparatus for use in an optical card |
| 04/21/1993 | EP0537787A2 Optical pickup apparatus |
| 04/21/1993 | EP0537712A2 Optical pickup apparatus |
| 04/21/1993 | EP0537567A2 Washing of polycarbonate and polyestercarbonate originated in waste |
| 04/20/1993 | US5204852 Optical disc-like recoding medium and manufacturing method thereof |
| 04/20/1993 | US5204848 Adjusting amplitude detection threshold by feeding back timing-data phase errors |
| 04/20/1993 | US5204781 Infinite large-aperture lens system with aspherical surfaces |
| 04/20/1993 | US5204516 Planar optical scanning head having deficiency-correcting grating |
| 04/20/1993 | US5204514 Information recording/reproducing method capable of fast-accessing |
| 04/20/1993 | US5204220 Compact disks having a light absorption layer containing a cyanine dye and a nickel salt of 1,2-dimercapto-1,2-diphenyl ethane; photostability |
| 04/20/1993 | US5204215 Wavelength multiplexed optical recording material |
| 04/20/1993 | US5204153 Write once read many type optical disc |
| 04/20/1993 | US5204152 Cushion material positioned above light reflection lasyer; protection plate; nonpeeling |
| 04/20/1993 | CA1316603C Optical recording medium and manufacturing method thereof |
| 04/20/1993 | CA1316602C Optical card and manufacturing method thereof |
| 04/20/1993 | CA1316600C Optical recording medium recording and reproducing device |
| 04/20/1993 | CA1316599C Recording and reproducing device for magneto-optical card |
| 04/20/1993 | CA1316598C Magneto-optic memory medium |
| 04/20/1993 | CA1316597C Magneto-optical memory apparatus and optical memory apparatus |
| 04/15/1993 | WO1993007616A1 Optical head for magneto-optical system |
| 04/15/1993 | WO1993007615A1 Optical disc master |
| 04/15/1993 | WO1993007614A1 Data reproducing apparatus |
| 04/15/1993 | DE4220193A1 Optical recording medium e.g. optical disc - has track spacing smaller than spot diameter of laser beam and track gap larger than optical wavelength |
| 04/15/1993 | DE4220192A1 Optical recording medium e.g. optical disc - has at least one pit for track servo control for several tracks in combination track |
| 04/14/1993 | EP0536764A1 Disc-shaped recording medium |
| 04/14/1993 | EP0536737A2 Information recording/reproducing apparatus for optical information recording medium |
| 04/14/1993 | EP0536718A2 Optical pickup apparatus |
| 04/14/1993 | EP0536558A1 Apparatus for optically recording and reproducing information |
| 04/14/1993 | EP0536484A1 Pickup device for optical recording medium |
| 04/14/1993 | EP0536406A1 Optical recording medium and its manufacturing |
| 04/14/1993 | EP0536404A1 Method for reproducing signal in optically recording medium |
| 04/14/1993 | EP0536336A1 Apparatus for eliminating focus/tracking crosstalk in an optical disk drive system |
| 04/14/1993 | EP0536112A1 Erasable optical wallet-size data card |
| 04/14/1993 | CN1071016A Photorefractive systems and methods |
| 04/14/1993 | CN1020312C Optical recording media and process for preparing same |
| 04/13/1993 | US5202881 Supported recording layer which can be reversibly and selectively transformed from crystalline to amorphous phases by varying conditions of radiation exposure(recording or erasing) |
| 04/13/1993 | US5202880 Thin film reflective layer which is covered by thin transparent dielectric layer covered by optically sensitive magnetic recording layer containing rare earth-transition metal alloys and thin transparent protective layer |
| 04/13/1993 | US5202878 Optical recording and reproducing method and apparatus for the same |
| 04/13/1993 | US5202877 Apparatus for detecting unused sector on record medium |
| 04/13/1993 | US5202875 Multiple data surface optical data storage system |
| 04/13/1993 | US5202874 Circuit arrangement for identifying the type of an optical record carrier |
| 04/13/1993 | US5202873 Agc circuit for optical disk data reproducing apparatus using alpc period detector |
| 04/13/1993 | US5202872 Optical disc player with servo system gain controlled with hysteresis by vibration sensor circuit |
| 04/13/1993 | US5202871 Focus servo control device |
| 04/13/1993 | US5202870 Optical disk recording/reproducing apparatus and a photoelectric conversion amplifier therefor |
| 04/13/1993 | US5202869 Optical head device including diffraction grating |
| 04/13/1993 | US5202868 Method of displacing a beam converging position and apparatus thereof |
| 04/13/1993 | US5202867 Condensing optical system with corrected chromatic aberration, and information recording/reproducing apparatus using this optical system |
| 04/13/1993 | US5202866 Digital audio disk player |
| 04/13/1993 | US5202865 Track access control apparatus for optical disk apparatus |
| 04/13/1993 | US5202864 Slip-off preventing tracking control apparatus |
| 04/13/1993 | US5202789 Optical system for preserving a state of polarization of light beam |
| 04/13/1993 | US5202220 Depositing antistatic and scratch-resistance metal oxides conductive and photocurable resin layer on one surface of the substrate, forming recording layer on other surface |
| 04/13/1993 | US5202171 Compact and magneto optical disks |
| 04/10/1993 | WO1993007530A1 Optical phased arrays |
| 04/10/1993 | CA2098118A1 Optical phased arrays |
| 04/08/1993 | DE4217279A1 Optical information recording material for re-recordable CD - comprising support, recording layer of 4-phase changing-type components, upper heat-resistant protective-layer and optical reflecting layer |
| 04/08/1993 | DE4134851A1 Compact disc with recessed underside - is sized to provide clearance and avoid surface damage with information section when stacked |
| 04/07/1993 | EP0535646A1 Pickup feeding apparatus for a double-sided reproducing disc player |
| 04/07/1993 | EP0535611A1 High resolution observation apparatus with photon scanning tunneling microscope |
| 04/07/1993 | EP0535583A2 Lens drive mechanism |
| 04/07/1993 | EP0535157A1 Method and apparatus for storing text data in subcode packs |
| 04/07/1993 | EP0535009A1 Process for optical data storage |
| 04/07/1993 | EP0407469B1 Process and device for non-intrusively, continuously and automatically taking, storing and supplying analysis samples and data for future evaluation |
| 04/06/1993 | US5200948 Recording method and apparatus |
| 04/06/1993 | US5200947 Optical recording medium, optical recording method, and optical recording device used in method |
| 04/06/1993 | US5200946 Simple magneto-optic rewritable head for roughedized environments |
| 04/06/1993 | US5200945 Optical data storage system with airflow defecting member |
| 04/06/1993 | US5200943 Method and apparatus for controlling encoding and recording of main information data in accordance with different detected data formats of the main information data |
| 04/06/1993 | US5200942 Focus adjusting apparatus for an optical pickup apparatus |
| 04/06/1993 | US5200941 Optical retrieval system for encoding pit angular data and optical recording element thereof |
| 04/06/1993 | US5200940 Optical unit actuator for information recording/reproducing apparatus |
| 04/06/1993 | US5200939 Optical head apparatus including a waveguide layer with concentric or spiral periodic structure |
| 04/06/1993 | US5200937 Apparatus for and method of recording and/or reproducing information by means of two actuators |
| 04/06/1993 | US5200492 Polymer blends |
| 04/06/1993 | US5200283 Information recording medium |
| 04/06/1993 | US5200120 Method of forming optical discs |
| 04/06/1993 | US5199988 Optical recording media |
| 04/06/1993 | CA1315879C System and method for accessing tracks for optical disc apparatus |
| 04/06/1993 | CA1315878C Method of and device for recording information, record carrier, and device for reading the recorded information |
| 04/06/1993 | CA1315548C Process for manufacturing an optical recording medium |