| Patents for G11B 11 - Recording on, or reproducing from, the same record carrier wherein for these two operations the methods or means are covered by different main groups of groups or by different subgroups of group; Record carriers therefor (14,351) |
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| 08/18/1992 | US5140568 Photomagnetic recording and erasing apparatus having magnetic field generating device including a coil and a recording media facing member which extends beyond the coil |
| 08/18/1992 | US5140566 Optical data recording and playback system |
| 08/18/1992 | CA1306517C Automatic gain control device for use in an optical memory device |
| 08/13/1992 | DE4104040A1 Pulse width modulated balancing and operation of unit - involves switched capacitor low=pass filter in control signal provision with quadrupled pulse width and period |
| 08/13/1992 | DE4103973A1 Compact disc recording and playback method - using decoder to identify data loss with increased speed transfer into buffer as correction |
| 08/12/1992 | EP0498461A2 System and method of reproducing signals recorded on a magneto-optic recording medium |
| 08/12/1992 | EP0498459A2 Magneto-optical medium and recording and/or reproducing apparatus thereof |
| 08/12/1992 | EP0498455A2 Magneto-optic recording method and magneto-optic recording/reproducing apparatus |
| 08/12/1992 | EP0498440A2 Magneto-optical recording medium |
| 08/12/1992 | EP0498435A2 Magneto-optical recording medium |
| 08/12/1992 | EP0498089A1 Magnetic medium |
| 08/12/1992 | CN1063573A Method apparatus, and medium for magneto-optical recording |
| 08/11/1992 | US5138605 Low-profile radial access mechanism for disk recording/playback apparatus, with optical head mounted on a carriage |
| 08/11/1992 | US5138598 Optical disk having relatively wide ram tracks and relatively narrow rom tracks |
| 08/09/1992 | CA2060535A1 Magneto-optic recording method and magneto-optic recording/reproduction apparatus |
| 08/06/1992 | DE4102800A1 Phase-locked loop with drift compensation for CD player, etc. - varies equalisation voltage of PLL until bit error rate is minimised during playing of disc |
| 08/06/1992 | DE4102705A1 Recording-reproducing digital data on magneto=optical disc - beginning recording or reproduction immediately after reading fixed table of contents |
| 08/04/1992 | US5136569 Optical disk recorder for diverse media types and having a predetermined initialization or start-up procedure |
| 08/04/1992 | US5136152 Hybrid optical pickup with integrated power emission and reading photodetectors |
| 08/04/1992 | US5135819 Sputtering a rare earth-transition metal alloy in the presence of a plasma confined by a magnetic field |
| 08/04/1992 | US5135791 Optical device |
| 08/04/1992 | CA1306056C Magnetic bias coil of a magneto-optical recording apparatus |
| 07/29/1992 | EP0496556A2 Magneto-optical recording |
| 07/28/1992 | US5134607 Optical memory system for generating a timing control signal for detecting a recorded region through a playback signal |
| 07/28/1992 | US5134606 Method and optical recording/reproducing apparatus for optimizing laser beam power |
| 07/28/1992 | US5134605 Optically readable media utilizing scanning tunneling microscope for excitation |
| 07/28/1992 | US5134602 Calibrating optical disk recorders to some parameters during disk spin up while deferring calibration of other parameters |
| 07/23/1992 | WO1992012528A1 Surface atom machining method and apparatus |
| 07/22/1992 | EP0536112A4 Erasable optical wallet-size data card. |
| 07/22/1992 | EP0444145B1 Circuit arrangement for identifying the type of an optical record carrier |
| 07/21/1992 | US5132959 Optical head in use with an optical recording/reproducing apparatus |
| 07/21/1992 | US5132954 Controls for optical disk relating to accessing and utilization of such disk |
| 07/21/1992 | US5132953 Multi-beam optical recording/reproducing apparatus for recording/reproducing on a medium having a recording flat part with a guide groove on each side |
| 07/21/1992 | US5132950 Optical head having a prism for splitting a beam of light into two polarized light beams |
| 07/21/1992 | US5132945 Magnetooptical recording medium allowing overwriting with two or more magnetic layers and recording method utilizing the same |
| 07/21/1992 | US5132944 Half-height magneto-optic disk drive |
| 07/15/1992 | EP0494767A2 Optical pick-up devices for recordable discs |
| 07/15/1992 | CN1062805A Manganese bismuth adding rare-earth element magneto-optical film medium |
| 07/14/1992 | US5130958 Method of and apparatus for overwritting a magneto-optic disk |
| 07/14/1992 | US5130869 Recording and/or reproducing apparatus including a cartridge loading device |
| 07/14/1992 | US5130857 Two diffraction gratings, coating a thin film |
| 07/14/1992 | US5130356 Addition of small amounts of diphenoquinone or diphenohydroquinone derivatives; compact disc substrates |
| 07/14/1992 | CA1305253C System for recording information signal, and record carrier and recording device for use in the system |
| 07/14/1992 | CA1305252C Overwriting system for magneto-optical recording |
| 07/07/1992 | US5128922 Optical disk with glass substrate and method of producing same |
| 07/07/1992 | US5128915 Optical pickup device |
| 07/07/1992 | US5128910 Magnetooptical recording method and apparatus used therefor |
| 07/07/1992 | US5128893 Electrostatic latent image recording/reproducing device |
| 07/07/1992 | US5128849 Optical disk structures for electron trapping optical memory media |
| 07/07/1992 | US5128806 Apparatus for driving optical system |
| 07/02/1992 | DE4041432A1 Magneto=optical memory with increased data writing rate - incorporates access control for selection of writing mode according to addressed area erasure |
| 07/01/1992 | EP0492888A2 Thin film magnetic head for use with magneto-optic disk drive |
| 07/01/1992 | EP0492584A2 Magneto-optical recording medium |
| 07/01/1992 | EP0492581A2 Method of reproduction from magneto-optical recording medium |
| 07/01/1992 | EP0492553A2 Magneto-optical recording medium |
| 07/01/1992 | EP0492514A2 Optical disc recording apparatus |
| 07/01/1992 | EP0492359A1 Magneto-optical recording medium |
| 06/30/1992 | US5126986 Over write capable magnetooptical recording medium, recording method and apparatus using the same |
| 06/30/1992 | US5126985 Method of recording information on a record carrier of the thermomagnetic type, and device for carrying out the method |
| 06/30/1992 | US5126984 External magnetic field generating device for optical magnetic disk apparatus |
| 06/30/1992 | US5126983 Apparatus for optically recording information on opto-magnetic record medium having a minimized leakage magnetic field |
| 06/30/1992 | US5126919 Cooling system for an electronic circuit device |
| 06/30/1992 | US5126563 Optical reading-writing apparatus having a moving unit |
| 06/24/1992 | EP0491337A1 Magneto-optical recording medium |
| 06/24/1992 | EP0491301A1 Apparatus and method for signal reproduction |
| 06/23/1992 | US5125052 Optical device for the observation of an elongated object |
| 06/23/1992 | US5124961 Floating head for use with a recording apparatus of magneto-optical memory device |
| 06/23/1992 | US5124868 Magneto-optic player with improved c/n ratio |
| 06/23/1992 | US5124183 Polymer dispersed liquid crystal memory film |
| 06/17/1992 | EP0490227A2 Magnetooptical disc with a double magnetooptical corrosion proof layer |
| 06/16/1992 | US5123007 Method for recording, reproducing and erasing information and thin film for recording information |
| 06/16/1992 | US5123004 Recording and/or reproducing apparatus having a vertically movable disk chassis and arranged to prevent external forces from disrupting proper operations |
| 06/16/1992 | US5122998 Magneto-optical recording and reproducing apparatus having magnetic head vertically moving support |
| 06/16/1992 | US5122903 Optical device and optical pickup device using the same |
| 06/16/1992 | CA1303739C Magneto-optic records |
| 06/10/1992 | EP0489112A1 Record holder for a magneto-optical recording and/or playback device. |
| 06/09/1992 | US5121369 Method and apparatus for direct overwriting information on a magneto-optical recording medium using constant laser beam modulated magnetic field generator |
| 06/09/1992 | US5120603 Magneto-optic recording medium with oriented langmuir-blodgett protective layer |
| 06/03/1992 | EP0488854A2 Method for the preparation of a magneto-optical recording medium |
| 06/03/1992 | EP0488648A2 Optical information recording/reproducing apparatus |
| 06/03/1992 | EP0487847A1 Magnetooptical recording medium |
| 06/03/1992 | CN1061673A Magnetooptical recording media |
| 06/02/1992 | US5119352 Magneto optic data storage read out apparatus and method |
| 06/02/1992 | US5118573 Magneto-optical recording medium |
| 05/27/1992 | EP0487321A2 Optical disk drive |
| 05/27/1992 | EP0487275A2 Magneto-optic data storage medium |
| 05/26/1992 | US5116693 Unique system of FE/PD for magneto-optical recording and magnetic switching devices |
| 05/26/1992 | CA1301923C Magneto-optic memory |
| 05/26/1992 | CA1301919C Information-carrying medium equipment for magneto-optic reading and writing |
| 05/20/1992 | EP0486265A2 Polarization detection system |
| 05/20/1992 | EP0485951A2 Garnet polycrystalline film for magneto-optical recording medium |
| 05/20/1992 | CN1061298A Magneto-optical recording medium |
| 05/19/1992 | US5115424 Optical storage medium with provision for limitation of thermal conduction |
| 05/19/1992 | US5115423 Optomagnetic recording/reproducing apparatus |
| 05/19/1992 | US5115420 Utilizing wasted laser light in optical systems |
| 05/13/1992 | EP0485359A2 An external magnetic field inverting apparatus for a magneto-optical disc apparatus |
| 05/13/1992 | EP0485234A2 Information recording and reproducing device |
| 05/13/1992 | EP0484945A2 Magneto-optical recording medium |
| 05/13/1992 | EP0484780A1 Stitched servo pattern and method for positioning an optical-magnetic read/write head |
| 05/12/1992 | US5113386 Focus and tracking error detector apparatus for optical and magneto-optical information storage systems |