| 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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| 09/06/1988 | CA1241745A1 Magnetic bubble memory module |
| 08/24/1988 | EP0279581A2 Magneto-optic memory |
| 08/24/1988 | EP0279287A2 Blends of thermoplastic polycarbonates and of thermoplastic styrol-maleic anhydride copolymers, and their use as carrier for optical memories |
| 08/24/1988 | EP0279183A2 Magneto-optic read-out method and apparatus |
| 08/17/1988 | EP0278756A2 Magnetic field generators |
| 08/16/1988 | US4764912 Optical focusing in magneto-optic disk system |
| 08/11/1988 | DE3802693A1 Magneto=optical recording system |
| 08/11/1988 | DE3802538A1 Device for sensing photomagnetic signals |
| 08/10/1988 | CN88100345A Method of recording and reproducing information |
| 08/09/1988 | US4763215 Device for writing high density data on a magnetic medium |
| 08/03/1988 | EP0276896A2 Optical information recording/reproducing apparatus |
| 08/03/1988 | EP0276873A1 Pickup apparatus for magneto-optical recording medium |
| 08/03/1988 | EP0276808A2 Method of recording and reproducing information |
| 08/03/1988 | EP0276326A1 Optical disc recording/reproducing apparatus |
| 08/02/1988 | US4761330 Magnetic material packed in porous anode oxidized aluminum coat |
| 07/27/1988 | EP0275972A1 Disk recording device |
| 07/27/1988 | EP0275747A1 Magnetic write and optical read head for a data carrier |
| 07/27/1988 | EP0275323A1 Ferromagnetic recording apparatus |
| 07/26/1988 | US4760565 High speed track access for optical disks using acousto-optic deflector |
| 07/26/1988 | US4760254 Apparatus and method for electron spin polarization detection |
| 07/20/1988 | EP0275189A2 Stable magneto optic recording medium |
| 07/20/1988 | EP0274567A2 Servo-system for positioning an optical beam |
| 07/14/1988 | WO1988005203A1 Optical disc and optical disc unit |
| 07/13/1988 | CN87108379A Etched glass and process of manufacturing same |
| 07/12/1988 | US4757472 Electrophotographic optical memory system |
| 07/06/1988 | EP0273295A2 Optical pick-up apparatus |
| 07/06/1988 | EP0273250A1 A method of recording on a magnetic record member and a magnetic recorder |
| 07/05/1988 | CA1238990A1 Apparatus and methods for electron spin polarization detection |
| 07/04/1988 | WO1988005202A1 Optical disc discriminating device |
| 06/29/1988 | EP0272935A2 Recording device and reproducing device |
| 06/28/1988 | US4754446 For processing information |
| 06/28/1988 | US4754355 Optical head |
| 06/28/1988 | US4753853 Double-layered magnetooptical recording medium |
| 06/23/1988 | DE3642161A1 Process for the production of a magneto-optical storage medium |
| 06/15/1988 | EP0271342A1 Magnet rotation control apparatus for magneto-optical recording |
| 06/15/1988 | EP0270874A2 Optical pick-up apparatus |
| 06/14/1988 | US4751142 Magneto-optical recording element |
| 06/14/1988 | US4751124 Information recording medium |
| 06/08/1988 | EP0270429A1 Integrated-optics read head for reading information recorded on a magnetic carrier |
| 06/07/1988 | US4750159 Apparatus for generating magnetic field in a magneto-optic recording/reproducing system |
| 06/07/1988 | US4750152 Optical read/write device |
| 06/02/1988 | WO1988004047A1 Device for generating and detecting magnetic material structures at atomic levels |
| 05/31/1988 | US4748606 External magnetic field inverting apparatus for magneto-optical disc apparatus |
| 05/31/1988 | US4748605 Bias-magnetic-field generating apparatus in magneto-optical information writing and erasing system |
| 05/24/1988 | US4746991 Recording characteristic evaluation of a recording medium with a time sequence of test signals |
| 05/11/1988 | EP0266833A1 Method of recording a binary signal on an optically readable record carrier and apparatus for carrying out the method |
| 05/11/1988 | DE3735385A1 Process for producing a magneto-optic recording medium |
| 05/10/1988 | US4743502 Complex oxide of aluminum, tantalum, tungsten and others for protective layer |
| 05/03/1988 | US4742218 Focus error detection apparatus utilizing focusing an front and rear sides of focal planes |
| 05/03/1988 | US4741967 Magnetic recording medium |
| 04/27/1988 | EP0265245A2 Method of erasable recording and reading of information |
| 04/26/1988 | US4740948 Disc cartridge |
| 04/26/1988 | US4740947 Dual surface optical memory disc |
| 04/26/1988 | US4740937 Optical magnetic information recording and reproducing apparatus with separate supporting members for supporting disc clamper and magnetic field biasing device |
| 04/26/1988 | US4740430 Magneto-optic memory |
| 04/20/1988 | EP0264285A2 Magneto-optical information reproducing apparatus |
| 04/20/1988 | EP0264284A2 Magneto-optical information reproducing apparatus |
| 04/13/1988 | EP0263685A2 Extra magnetic field positioning apparatus |
| 04/13/1988 | EP0263663A2 Information processing apparatus in which erasing means is driven for a period longer than the necessary period |
| 04/13/1988 | EP0263380A2 Process for manufacturing a magnetooptical recording medium |
| 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 | US4737408 Magneto-optical recording medium having plasma-polymerized protective layers |
| 04/05/1988 | US4735698 Method of making magneto-optical recording medium |
| 04/05/1988 | CA1234916A1 Magneto-optic memory element |
| 04/05/1988 | CA1234684A1 Method for manufacturing an optical memory element |
| 03/30/1988 | EP0261545A1 Detection device for determining focus error in an optical data storage apparatus |
| 03/29/1988 | US4734334 Magneto-optical recording medium |
| 03/24/1988 | WO1988002033A1 Method for making an amorphous aluminum-nitrogen alloy layer |
| 03/24/1988 | DE3731514A1 Optisches informationsaufzeichnungsmedium The optical information recording medium |
| 03/23/1988 | EP0260488A1 High speed track access for optical disks using acousto-optic deflector |
| 03/22/1988 | US4733385 Signal recording and reproducing apparatus for an opto-magnetic disk |
| 03/22/1988 | US4733065 Optical head device with diffraction grating for separating a light beam incident on an optical recording medium from a light beam reflected therefrom |
| 03/16/1988 | EP0260161A1 Process for reducing the ageing of a magnetooptic medium |
| 03/16/1988 | EP0260114A2 Opto-magnetic signal reproducing apparatus for reading, by differential detection using a magneto-optical effect, information magnetically recorded on a record medium |
| 03/16/1988 | EP0259753A2 Mixtures of thermoplastic polycarbonates and thermoplastic styrene-maleic anhydride copolymers, and their use as substrates in optical data memories |
| 03/15/1988 | US4731773 Thermally-induced recording with reduced harmonic distortion |
| 03/15/1988 | US4731772 Optical head using hologram lens for both beam splitting and focus error detection functions |
| 03/15/1988 | US4731754 Erasable optical memory material from a ferroelectric polymer |
| 03/09/1988 | EP0258978A2 Magnetooptical recording medium allowing overwriting with two or more magnetic layers and recording method utilizing the same |
| 03/08/1988 | US4730297 Retardation compensating light beam guiding system in an optical storage medium drive apparatus |
| 03/08/1988 | US4730294 Optical information-recording/reproducing apparatus with cancellation for offset contained in error signal |
| 03/08/1988 | US4730289 Magnetic-optical disc memory system and apparatus for switching header and data information |
| 03/02/1988 | EP0257530A2 Thermo-magnetic recording method applying power modulated laser on magnetically coupled double layer structure of perpendicular anisotropy film |
| 03/02/1988 | CN87106297A Thermo-magnetic recording method applying power modulated laser on magnetic ally coupled double layer structure of perpendicular anisotropy film |
| 03/01/1988 | US4729122 Magneto-optical reproducing head of a high light utilization rate |
| 02/25/1988 | WO1988001425A1 Optomagnetic recording medium and process for its manufacture |
| 02/24/1988 | EP0256827A2 Apparatus for recording and reproducing data into/from an optical disc |
| 02/24/1988 | EP0256685A2 Optical system and components for optical disk reader |
| 02/24/1988 | EP0256110A1 Apparatus and method for increasing storage capacity of recording media. |
| 02/23/1988 | US4727533 Optical data storage and retrieval apparatus |
| 02/23/1988 | US4727005 Magneto-optical recording medium having amorphous artificially layered structure of rare earth element and transition metal element |
| 02/11/1988 | WO1988001093A1 Ferromagnetic recording apparatus |
| 02/11/1988 | WO1988001092A1 Optical disc recording/reproducing apparatus |
| 02/10/1988 | EP0255649A2 Information signal recording device |
| 02/03/1988 | EP0254749A1 Optical memorizing device |
| 01/26/1988 | US4721850 Optical pickup device having a detector for detecting the light emitting intensity variation of a semiconductor light emitting element |
| 01/26/1988 | US4721658 Amorphous magneto optical recording medium |
| 01/26/1988 | US4721368 Optical system in a magneto-optical memory device |
| 01/20/1988 | EP0253613A2 Optical head |