| 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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| 04/27/1988 | EP0264837A1 Automatic gain control circuit for a control amplifier |
| 04/27/1988 | EP0264792A2 Thermoplastic compositions from aromatic polycarbonates and polystyrenes and their use as substrates for optical data recorders |
| 04/26/1988 | US4740947 Dual surface optical memory disc |
| 04/26/1988 | US4740942 Record confirmation apparatus |
| 04/26/1988 | US4740941 System for aligning sector marks with data in a disk storage system |
| 04/26/1988 | US4740940 Optical information read apparatus |
| 04/26/1988 | US4740939 Apparatus for reproducing information recorded on a disk |
| 04/26/1988 | US4740938 Apparatus for rapid reproduction of information from a record carrier |
| 04/26/1988 | US4740679 Disc focus servo-circuit with ordered reference level setting means |
| 04/26/1988 | US4740449 Phase transition of gelled polymer by light modification of organo-compound |
| 04/26/1988 | US4740447 Optical recording medium |
| 04/26/1988 | US4740266 Method of making memory devices |
| 04/26/1988 | US4739546 Laser element assembly and method of fabricating the same |
| 04/26/1988 | CA1235812A1 Disc playback apparatus |
| 04/26/1988 | CA1235811A1 Switching laser beam apparatus for optical recording |
| 04/21/1988 | WO1988002918A1 Optical recording method for data cards |
| 04/21/1988 | WO1988002914A1 Optical disk assembly |
| 04/20/1988 | EP0264285A2 Magneto-optical information reproducing apparatus |
| 04/20/1988 | EP0264274A2 Optical recording medium |
| 04/20/1988 | EP0264198A2 Optical information recording medium |
| 04/19/1988 | US4739345 Optical recording disk |
| 04/19/1988 | US4739029 Polymeric cyanine dye |
| 04/19/1988 | CA1235502A1 Apparatus for reproducing information from an optically readable record carrier |
| 04/19/1988 | CA1235501A1 Apparatus for reproducing information from an optically readable record carrier |
| 04/19/1988 | CA1235500A1 Apparatus for reading a disc-shaped record carrier |
| 04/19/1988 | CA1235499A1 Apparatus for reading an optically readable record carrier |
| 04/19/1988 | CA1235498A1 Apparatus for reading a disk-shaped optical record carrier |
| 04/19/1988 | CA1235497A1 Aperture compensation signal processor for optical recording |
| 04/19/1988 | CA1235495A1 System of reproducing information from an optically readable record carrier |
| 04/19/1988 | CA1235494A1 Head positioning servo system for optical recording |
| 04/19/1988 | CA1235493A1 Apparatus for reproducing digital information via a transmission medium |
| 04/19/1988 | CA1235492A1 Disc playback apparatus |
| 04/19/1988 | CA1235271A1 Molding process |
| 04/13/1988 | EP0263663A2 Information processing apparatus in which erasing means is driven for a period longer than the necessary period |
| 04/13/1988 | EP0263656A2 Tape recording |
| 04/13/1988 | EP0263641A2 Method for making an erasable optical data storage medium |
| 04/13/1988 | EP0263432A1 Method for preparing aromatic bischloroformate compositions and polycarbonates |
| 04/13/1988 | CN87107071A Optically readable record carrier for recording information |
| 04/13/1988 | CN87106610A Polymere substrate for making lasser disc records and lasser disc records thereby |
| 04/12/1988 | US4737947 Recording medium having optomagnetic recording layer and optical recording layer with guide tracks of specific reflectance |
| 04/12/1988 | US4737946 Device for processing optical data with improved optical allignment means |
| 04/12/1988 | US4737934 Data storage device and system having an optically non transmissive chalcogenide layer |
| 04/12/1988 | US4737798 Laser diode mode hopping sensing and control system |
| 04/12/1988 | US4737696 Actuator drive circuit |
| 04/12/1988 | US4737573 Using phosgene, dihydroxy compound, water and an inert organic liquid at a basic ph, followed by interfacial catalytic polymerization |
| 04/12/1988 | US4737444 Undercoating is polymer containing metal alcoholate |
| 04/12/1988 | US4737443 Optical recording medium |
| 04/12/1988 | US4737427 Optical high density recording mediums, method for making same and method for recording optical information in the medium |
| 04/12/1988 | US4737408 Magneto-optical recording medium having plasma-polymerized protective layers |
| 04/12/1988 | US4736966 Data card with peelable protective layers |
| 04/12/1988 | CA1234982A1 Optical data storage medium having chromophore/polymer coordinated information layer |
| 04/07/1988 | WO1988002541A1 Optical card recording apparatus |
| 04/07/1988 | WO1988002537A1 Spherical pivoting actuator for read/record head |
| 04/06/1988 | EP0262973A2 Protective member covering device for optical recording medium and optical information recording and reading device |
| 04/06/1988 | EP0262960A2 Medium and method for erasably recording data by viscoelastic shear deformation |
| 04/06/1988 | EP0262861A2 Apparatus for coating substrate devices |
| 04/06/1988 | EP0262713A1 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 |
| 04/06/1988 | EP0262668A2 Astigmatism generator |
| 04/06/1988 | EP0262557A1 Polycarbonate and optical disk therefrom |
| 04/06/1988 | EP0262502A2 Compatible mixtures from polycarbonate and methylmethacrylate copolymers |
| 04/06/1988 | CN87105672A Information reproducing and recording apparatus |
| 04/05/1988 | US4736354 Focus servo device for detecting and compensating for disk abnormalities |
| 04/05/1988 | US4736353 Disc accessing using coarse and fine actuators with the fine actuator locked during coarse actuator movement |
| 04/05/1988 | US4736352 Optical recording medium and apparatus for recording and reproducing data therein |
| 04/05/1988 | US4736258 High density storage of information on a compact disc |
| 04/05/1988 | US4735889 Optical recording medium |
| 04/05/1988 | US4735888 Dispersion of metal oxide in hydrocarbon matrix-heat resistance recording layer |
| 04/05/1988 | US4735879 Recording media and recording methods |
| 04/05/1988 | US4735878 Transmission through substrate and photoresist layers |
| 04/05/1988 | US4735839 Indole polymethines; storage stability |
| 04/05/1988 | CA1234914A1 Sync pattern encoding system for data sectors written on a storage medium |
| 04/05/1988 | CA1234684A1 Method for manufacturing an optical memory element |
| 03/30/1988 | EP0261918A2 Method of recording indicia for indicating presence or absence of error in medium after error checking and apparatus therefor |
| 03/30/1988 | EP0261916A2 Servomechanism for recording disk reproducing system |
| 03/30/1988 | EP0261608A2 Optical recording medium |
| 03/30/1988 | EP0261545A1 Detection device for determining focus error in an optical data storage apparatus |
| 03/30/1988 | CN85101886B Optically readable storage disc |
| 03/29/1988 | US4734914 Stabilized laser apparatus |
| 03/29/1988 | US4734906 Optical disk recording and readout system having read, write and coarse light beams |
| 03/29/1988 | US4734905 Optical head device |
| 03/29/1988 | US4734904 Reproducing-only and recordable-reproduceable optical discs and common optical disc player therefor |
| 03/29/1988 | US4734903 Level control circuit for light beam recording apparatus |
| 03/29/1988 | US4734901 Recording and reproducing apparatus |
| 03/29/1988 | US4734900 Restoring and clocking pulse width modulated data |
| 03/29/1988 | US4734899 Optical scanning unit for projecting a beam onto an optical record carrier with positional control using sets of three coils with each set connected using two amplifiers |
| 03/29/1988 | US4734565 Read-only optical card and system |
| 03/29/1988 | US4734488 Polycarbonate and optical disc substrate |
| 03/29/1988 | US4733943 Pickup for optical disc |
| 03/29/1988 | US4733631 Apparatus for coating substrate devices |
| 03/24/1988 | WO1988002169A1 Dual beam optical data system |
| 03/24/1988 | WO1988002134A1 Read-only optical data card |
| 03/24/1988 | DE3731514A1 Optisches informationsaufzeichnungsmedium The optical information recording medium |
| 03/23/1988 | EP0260987A2 Offset compensating circuit, in fine control servo device |
| 03/23/1988 | EP0260921A2 Erasable optical recording method |
| 03/23/1988 | EP0260920A2 Thin film amorphous optical recording films |
| 03/23/1988 | EP0260786A2 Liquid crystal polymers |
| 03/23/1988 | EP0260722A2 Erroneous track jump restoration apparatus for optical record disc player |
| 03/23/1988 | EP0260674A2 Free surface casting method |
| 03/23/1988 | EP0260637A2 Optical information recording/reproducing apparatus |
| 03/23/1988 | EP0260622A2 Optical data storage accessing apparatus |