| 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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| 05/10/1989 | EP0314859A1 Magneto-optic memory device |
| 05/10/1989 | CN1032876A Magnetooptical recording media |
| 05/09/1989 | US4829507 Atomic particles deposited in pattern on adsorptive carrier |
| 05/09/1989 | US4829503 Optical memory |
| 05/03/1989 | EP0314518A2 Magnetooptical recording media |
| 05/03/1989 | EP0314424A2 Magneto-optic recording medium |
| 05/03/1989 | EP0314200A2 Optical focus position control device |
| 05/03/1989 | EP0313682A1 Beam-analyzer for optical storage device |
| 05/02/1989 | US4826732 Recording medium |
| 04/27/1989 | DE3832655A1 Magneto-optical recording medium |
| 04/26/1989 | EP0313334A2 Magneto-optic recording medium and method of magneto-optic recording using the same medium |
| 04/26/1989 | CN1032599A Optical scanner |
| 04/26/1989 | CN1032597A Magneto-optical recording apparatus and energizing circuit for use in such magneto-optical recording apparatus |
| 04/25/1989 | US4825428 Optomagnetic recording, reading and erasing method and implementing apparatus which permits overwriting of previously recorded information |
| 04/25/1989 | CA1253249A1 Signal recording and reproducing apparatus for an opto-magnetic disk |
| 04/20/1989 | WO1989003510A1 Analyzer |
| 04/19/1989 | EP0312403A2 Optical system for preserving a state of polarization of light beam |
| 04/19/1989 | EP0312143A1 Magneto-optical recording apparatus and energizing circuit for use in such a magneto-optical recording apparatus |
| 04/19/1989 | EP0311691A1 Optical recording/reproducing apparatus |
| 04/18/1989 | US4823220 Detector for magnetooptic recorders |
| 04/18/1989 | US4822675 Corrosion resistant alloy containing rare earth and transition metal |
| 04/18/1989 | CA1252887A1 Magnetooptical storage element |
| 04/12/1989 | EP0311486A1 Device for optical reading of and magnetic writing on an information carrier |
| 04/12/1989 | EP0311485A1 Servo controlled device for optical reading of and magnetic writing on an information carrier |
| 04/12/1989 | EP0310812A1 Method for reducing noise in a data signal and optical pick-up device |
| 04/12/1989 | EP0310795A1 Optical pick-up device and method for an optical pick-up device |
| 04/12/1989 | EP0310680A1 Photomagnetic recording membrane |
| 04/12/1989 | CN1032408A Magnetooptical recording film |
| 04/11/1989 | US4821250 Process and apparatus for the recording of an information signal |
| 04/11/1989 | US4820394 Phase changeable material |
| 04/06/1989 | WO1989003111A1 Preparation of thin layers of iron iii oxide for optical and/or magnetic recording |
| 04/06/1989 | WO1989003110A1 Preparation of thin layers of iron iii oxide for optical and/or magnetic recording |
| 04/05/1989 | EP0310397A2 Information recording medium having a glass substrate |
| 04/05/1989 | EP0310392A2 Magneto-optic memory medium |
| 04/05/1989 | EP0309721A1 Optical-recording medium |
| 04/05/1989 | EP0309675A1 Noise damping method for an optical pick-up device |
| 04/05/1989 | EP0309639A2 A method of automatically evaluating the quality of an audio-video program recorded on a recording medium |
| 04/04/1989 | US4819206 Optical recording system |
| 04/04/1989 | US4818648 Optical memory element |
| 03/29/1989 | EP0309232A2 Optical information recording and reproducing apparatus |
| 03/29/1989 | EP0309200A2 Optical information recording/reproducing apparatus |
| 03/29/1989 | EP0308537A1 Sensor for converting a distance to optical and further to electrical energy, and surface scanning apparatus using same |
| 03/23/1989 | DE3730969A1 Magneto-optical store with a magnetic head integrated into the scanning unit |
| 03/23/1989 | DE3730461A1 Process and apparatus for producing a magnetooptical layer |
| 03/22/1989 | EP0308201A1 Method of forming a sputtering target for use in producing a magneto-optic recording medium |
| 03/22/1989 | EP0307554A1 Amorphous magneto optical recording medium |
| 03/21/1989 | US4814907 Method and apparatus for maintaining constant flying height via magnetic interaction |
| 03/21/1989 | US4814903 Alternate storage areas in magnetooptical media |
| 03/21/1989 | US4814238 Magneto-optical recording medium |
| 03/15/1989 | EP0307211A2 Memory reading device |
| 03/14/1989 | US4813032 Magneto-optical information reproducing apparatus in which the azimuth angle of the transmission axis of an analyzer is optimized so that the C/N ratio of a reproducing signal is maximum |
| 03/14/1989 | US4813007 External magnetic field generating device |
| 03/14/1989 | US4812633 Optical data card |
| 03/08/1989 | EP0305979A2 Optical recording and reproducing system using optical recording medium |
| 03/08/1989 | EP0305666A1 Amorphous magneto optical recording medium |
| 03/07/1989 | US4810868 Frasable optical wallet-size data card |
| 03/07/1989 | US4810435 Radiation polymerization |
| 03/07/1989 | US4810065 High-frequency light polarization modulator device |
| 03/01/1989 | EP0305185A1 Opto-magnetic recording medium having plurality of exchange-coupled magnetic layers |
| 03/01/1989 | EP0305033A2 Recording device and reproducing device |
| 03/01/1989 | EP0304992A2 Method for writing binary information in a magnetooptical memory layer and device for recording according to this method |
| 03/01/1989 | EP0304873A1 Magneto-optical recording medium |
| 03/01/1989 | EP0304560A2 Photodetector having cascaded photoelements |
| 02/28/1989 | US4808456 Rare earth-transition metal alloy recording layer with rare earth metal covered edges |
| 02/23/1989 | WO1989001688A1 Improved apparatus for magneto-optical recording |
| 02/23/1989 | WO1989001687A1 Photomagnetic recording medium |
| 02/23/1989 | WO1989001686A1 Disk-like recording medium and disk apparatus |
| 02/22/1989 | EP0304298A2 Magnetic head drive circuit |
| 02/22/1989 | EP0304288A1 Magneto-optical information storage medium and method for recording and erasing information |
| 02/21/1989 | US4807220 Optically recordable carrier |
| 02/21/1989 | US4807213 Laser drum for use in recording and reproducing information on optical tapes |
| 02/21/1989 | US4807210 Optical information processing apparatus |
| 02/21/1989 | US4807209 Record carrier body with a follow-on track and apparatus for recording information thereon |
| 02/21/1989 | US4807204 Magneto-optical recording medium having pairs of mutually corresponding recording segments, and apparatus for recording information on the medium |
| 02/15/1989 | EP0303209A2 Flat multiplayered laser-optical recording material |
| 02/15/1989 | EP0303086A2 Method of making a substrate for a magneto-optical recording layer, injection-moulding apparatus for making a substrate as well as substrate for a magneto-optical recording layer |
| 02/14/1989 | US4805144 Solid memory medium and information reproduction system using the medium |
| 02/14/1989 | US4805043 Microgap recording using ferrimagnetic medium for magneto-optic playback |
| 02/09/1989 | WO1989001221A1 Magneto-optical storage |
| 02/08/1989 | EP0302393A2 Magneto-optical recording medium |
| 02/07/1989 | US4803674 Magneto-optical recorder with small-sized, low-powered electromagnetic coil |
| 02/07/1989 | US4803660 Optical recording medium |
| 02/07/1989 | US4803579 Magneto-optical information reproducing apparatus in which divided reproducing lights are differentially detected by a photodetector having no amplifying action through an analyzer whose transmission axis azimuth is optimized |
| 02/07/1989 | US4803129 Terbium, iron, cobalt, berilium, titanium, and aluminum alloy; corrosion resistance |
| 02/02/1989 | DE3822388A1 Plattenfoermiges aufzeichnungsmedium mit festwertspeicher-spuren, beschreibbaren bereichen und mit antriebseinrichtung Plattenfoermiges recording medium with a fixed value memory-traces, writable areas and with power supply device |
| 01/31/1989 | US4802021 Recording and/or reproducing apparatus using opto-magnetic disc |
| 01/31/1989 | US4801794 Data detection and optical focus error detection system for rotating optical media |
| 01/31/1989 | US4801499 Optical recording medium |
| 01/26/1989 | WO1989000748A1 Digital storage |
| 01/26/1989 | WO1989000742A1 Erasable optical wallet-size data card |
| 01/24/1989 | US4800112 Adhesives, multilayer, stability, weatherproofing |
| 01/17/1989 | US4799114 Thermomagnetic recording carrier and a method for thermomagnetic recording |
| 01/11/1989 | EP0298612A1 An optical memory device |
| 01/11/1989 | EP0298137A1 Method for recording data on recording material and such a recording material |
| 01/10/1989 | US4797866 Optical recording/reproducing apparatus |
| 01/10/1989 | US4797331 Magneto-optical recording material |
| 01/10/1989 | US4797316 Etched glass and process of manufacturing same |
| 01/04/1989 | EP0297910A2 An optical memory device |
| 01/04/1989 | EP0297885A2 Integrated semi conductor laser device |
| 01/04/1989 | EP0297689A2 Magneto-optic memory element |