| 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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| 08/22/1989 | US4860278 Optical recording carrier, and recording-reading apparatus, and recording-reading process, employing the same |
| 08/16/1989 | EP0328354A2 Optical information processing apparatus |
| 08/16/1989 | EP0327888A2 Process for producing on a surface a thin, X-rays-amorphous layer of aluminium nitride or of aluminium-silicon nitride |
| 08/16/1989 | EP0327636A1 Improved apparatus for magneto-optical recording |
| 08/16/1989 | CN1034820A Method of recording information on a record carrier of the thermomagnetic type, and device for carrying out the method |
| 08/15/1989 | US4858220 Laser control circuit for optical data recording/reproduction apparatus |
| 08/15/1989 | US4858218 Optical recording medium and reproducing apparatus |
| 08/15/1989 | US4858212 Recording method on magnetooptical disc with laser magnetic field |
| 08/09/1989 | EP0327315A2 Magneto-optic recording medium and method for magneto-optically recording on said medium |
| 08/09/1989 | EP0327257A2 Magneto optic recording medium with silicon carbide dielectric |
| 08/09/1989 | EP0327236A2 Image pickup apparatus |
| 08/09/1989 | EP0326935A2 Process for producing on a surface a thin, X-rays-amorphous layer od aluminium nitride or of aluminium-silicon nitride |
| 08/09/1989 | EP0326933A2 Process for the production of a planar multilayered magnetooptical-recording material |
| 08/09/1989 | EP0326932A2 Planar multilayered magnetooptical-recording material |
| 08/09/1989 | EP0326930A2 Planar multilayered magnetooptical-recording material |
| 08/08/1989 | US4855986 Data storage and readout optical head using a single substrate having an electrooptic converging portion for adjustment of the light beam focal point |
| 08/08/1989 | US4855985 Digital storage |
| 08/08/1989 | US4855976 Information writing method for an optical disc memory system utilizing a smectic chiral liquid crystal |
| 08/08/1989 | US4855975 Over write capable magnetooptical recording method using two beams, and magnetooptical recording apparatus therefor |
| 08/02/1989 | EP0326342A2 Information recording medium, production process and molding die for substrate therefor |
| 08/02/1989 | EP0326215A1 Optically readable record carrier of the inscribable type and optical read apparatus for reading such a record carrier |
| 08/02/1989 | EP0326206A1 Method of and apparatus for recording an information signal |
| 08/02/1989 | CN1034445A Method of and apparatus for suecessively recording efm-modulated signals |
| 08/01/1989 | US4853923 Maneto-optical recording apparatus with path length compensated dual photo-electric conversion |
| 08/01/1989 | US4853919 Information processing apparatus in which a deflected light and O-order light are respectively used for information recording/reproduction and tracking, and a method therefor |
| 08/01/1989 | US4853912 Process and apparatus for simultaneous erasure and recording in magneto-optical recording |
| 08/01/1989 | US4853911 Optical disc memory system utilizing a smectic chiral liquid crystal |
| 08/01/1989 | CA1258123A1 Read/write head for optical disks |
| 07/26/1989 | EP0325570A1 Poly(hydroxyether-diphenyldimethylsiloxane) copolymers and uses thereof |
| 07/26/1989 | EP0325491A1 Automatic gain control device for use in an optical memory device |
| 07/26/1989 | EP0325488A1 Analog signal switching device for use in an optical memory device |
| 07/26/1989 | EP0325330A1 Optically readable record carrier of the inscribable type, apparatus for manufacturing such a record carrier, and apparatuses for recording and/or reading information on/from such a record carrier |
| 07/26/1989 | EP0325329A1 Method of and apparatus for successively recording EFM-modulated signals |
| 07/26/1989 | EP0325104A2 Magneto-optical head with separate optical paths for error and data detection |
| 07/26/1989 | EP0325103A2 Method for constructing an optical head by varying a hologram pattern |
| 07/26/1989 | EP0324949A1 Tracking system for optical disc memory |
| 07/26/1989 | EP0324854A1 Optomagnetic recording medium and process for its manufacture |
| 07/26/1989 | EP0324853A1 Magneto-optical disk. |
| 07/26/1989 | EP0324831A1 Erasable optical wallet-size data card |
| 07/25/1989 | US4851096 Deposition of sintered silicon nitride layer with refractive index improving additive |
| 07/19/1989 | EP0324684A2 Floating type magneto-optic disk reading head system having external semiconductor laser resonator operating at orthogonal two mode oscillations |
| 07/19/1989 | EP0324123A2 Method and apparatus for manufacturing of a magneto-optic recording and/or erasable information carrier |
| 07/18/1989 | US4849952 Magnetooptical information recording apparatus having intensified magnetic flux applying means |
| 07/18/1989 | US4849304 Optical recording medium |
| 07/12/1989 | CN1033892A Magnetic light recorder |
| 07/11/1989 | US4847824 Readback circuits for magnetooptic players |
| 07/11/1989 | US4847823 Method and apparatus for reading or measuring magneto-optical storage media using pinhole aperture |
| 07/06/1989 | DE3743871A1 Magneto-optical storage medium |
| 07/05/1989 | EP0323346A1 Magneto-optical recording medium resistant to corrosion in a humid atmosphere |
| 07/05/1989 | EP0323232A2 Recording and reproducing device for magneto-optical card |
| 07/05/1989 | EP0323167A2 Helical scan tape record apparatus and method |
| 07/05/1989 | EP0322817A2 Recording method for magnetoptical disk and apparatus therefor |
| 07/05/1989 | EP0322714A2 Polarizing optical element and device using the same |
| 07/05/1989 | CN1033654A Method of manufacturing sputtering target, sputtering target manufactured thereby and magnetooptic recording medium manufactured by using the same |
| 07/04/1989 | US4845696 Apparatus for optically recording and reproducing information in record tracks on a rotatable record disk |
| 06/29/1989 | WO1989006038A1 Magneto-optical recording medium |
| 06/29/1989 | WO1989006037A1 Data recording medium |
| 06/28/1989 | EP0322385A2 Readback circuits for magnetooptic players |
| 06/28/1989 | EP0321704A2 Optical recording medium |
| 06/28/1989 | CN1004660B Optical storage |
| 06/27/1989 | US4843604 Beam controller for magneto-optical disc memory system |
| 06/27/1989 | US4843600 Recording head for magneto-optical information recording apparatus |
| 06/27/1989 | US4842956 Opto-magnetic recording medium having three exchange-coupled magnetic layers |
| 06/27/1989 | US4842381 Electrochromic data recording systems |
| 06/21/1989 | EP0321314A2 Optical disc |
| 06/21/1989 | EP0321250A2 Magneto-optic memory device |
| 06/21/1989 | EP0321027A2 Method of recording information on a record carrier of the thermomagnetic tye, and device for carrying out the method |
| 06/21/1989 | EP0320975A2 Information recording/reproducing method and apparatus |
| 06/20/1989 | US4841510 Optical characteristic measuring apparatus for an optical recording medium substrate |
| 06/20/1989 | US4841502 Information recording system and reproducing for recording and reproducing information on a magneto-optical disk |
| 06/20/1989 | US4841501 Plastic substrate for optical disk and process for producing the same |
| 06/20/1989 | US4841407 Magnetic field generator having a plurality of coils for generating magnetic field in substantially the same space and method of driving the same |
| 06/14/1989 | EP0320286A2 Magnetooptical recording medium |
| 06/14/1989 | EP0319636A1 Magneto-optic memory device |
| 06/14/1989 | CN1004526B Storing device for phase changeable material |
| 06/13/1989 | US4839226 Multilayer; transparent substrates, magnetic oxide, and band shapes reflection layer |
| 06/13/1989 | US4838962 Magneto-optical recording medium |
| 06/07/1989 | EP0319033A2 Method for detecting focus error using light beams having astigmatism and optical information processing system using this method. |
| 06/07/1989 | EP0319004A2 Magneto-optical recording medium |
| 06/07/1989 | EP0318925A2 Method for optically reproducing a signal from magneto-optical recording medium |
| 06/07/1989 | EP0318772A1 Optical focus position control device |
| 06/06/1989 | US4837758 Magneto-optical recording reproducing device having field applying means |
| 06/06/1989 | US4837118 Magneto-optical recording medium |
| 05/31/1989 | EP0318337A2 Magneto-optic memory medium |
| 05/31/1989 | EP0317982A2 Magneto-optical recording medium |
| 05/30/1989 | US4835751 Reading system for use with optical disc memory system utilizing a smectic chiral liquid crystal |
| 05/24/1989 | EP0317535A2 Detector for magnetooptic recorders |
| 05/24/1989 | EP0317319A2 Amorphous oxide magnetic material |
| 05/24/1989 | EP0316803A2 Magneto-optical recording medium |
| 05/24/1989 | EP0316615A1 Amorphous magnetooptical recording material |
| 05/24/1989 | EP0316508A1 Magneto-optic memory device |
| 05/23/1989 | US4833662 Reproduction apparatus for a magneto-optical recording medium |
| 05/23/1989 | US4833561 Pickup apparatus for magneto-optical recording medium |
| 05/23/1989 | US4833043 Amorphous magneto optical recording medium |
| 05/23/1989 | US4832980 Magneto-optical recording medium and manufacturing thereof |
| 05/23/1989 | CA1254385A1 Magneto-optical recording medium having amorphous artificially layered structure of rare earth element and transition metal element |
| 05/17/1989 | EP0316188A2 Method and apparatus for direct overwriting of digital data recorded on magneto-optical recording media including a direct overwrite magneto-optic system for strip erasing and recording elongated domains and a single-head, direct overwrite magneto-optic system |
| 05/16/1989 | US4831608 Multi-layer high density information recording carrier having a non-alkali inorganic glass protective layer |
| 05/16/1989 | CA1254037A1 Magneto-optical medium |
| 05/10/1989 | EP0315415A2 Overwriting information in magneto-optical memory |