| 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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| 05/29/1991 | EP0428946A2 Magneto-optic recording medium |
| 05/29/1991 | EP0428677A1 Magnetic field modulation control circuit for recording a magneto-optic memory. |
| 05/29/1991 | CN1051812A Method of and apparatus for writing and reading a magneto=optical record carrier |
| 05/28/1991 | US5020042 Apparatus for selectively inverting a magnetic bias field using a rod-shaped permanent magnet surrounded with an electrically conductive damping means |
| 05/28/1991 | US5020041 Magneto-optical memory apparatus having a floating magnetic head |
| 05/28/1991 | US5020040 Overwriting system for magneto-optical recording with self timing track |
| 05/28/1991 | US5019462 Sheet-like, multilayer magneto-optical recording material |
| 05/22/1991 | EP0428454A2 Magnetooptical recording element |
| 05/22/1991 | EP0428321A2 Magnetic-optical recording media and apparatus |
| 05/22/1991 | EP0428271A2 Magneto-optical recording medium and apparatus |
| 05/22/1991 | EP0428155A2 Rare earth-iron-garnet fine particles and magneto-optical material using the same |
| 05/22/1991 | EP0428128A2 Magneto-optical recording medium |
| 05/22/1991 | EP0427982A2 Magneto-optical recording medium |
| 05/22/1991 | CN1012656B Thermo-magnetic recording method |
| 05/21/1991 | US5018126 Checking media operations and recording during optical recording |
| 05/21/1991 | US5018120 Optical recording medium track indexing system |
| 05/21/1991 | US5018119 Method for reproducing signal using an external magnetic field from magneto-optical recording medium having three magnetic layers |
| 05/21/1991 | US5016992 Method of and apparatus for the reading of magnetically stored information |
| 05/16/1991 | WO1991006951A1 Pretreatment of overwritable opto-magnetic recording medium and pretreated overwritable opto-magnetic recording medium |
| 05/16/1991 | WO1990010916A3 Erasable optical wallet-size data card |
| 05/16/1991 | DE4035827A1 Magneto=optical recording medium - uses layer of ferrite particles between layers of transparent and reflective materials |
| 05/15/1991 | EP0427478A2 Disk recording and reproducing apparatus using two laser beams |
| 05/15/1991 | EP0427325A1 Method of and apparatus for writing and reading a magneto-optical record carrier |
| 05/15/1991 | EP0426864A1 Magnetooptical medium |
| 05/14/1991 | US5016232 Magneto-optic information-carrying medium including three magnetic layers |
| 05/14/1991 | US5015835 Optical information reading and writing device with diffraction means |
| 05/14/1991 | US5015699 Polyimines from hydrazine or diamines and diketones and reaction with iron ions |
| 05/08/1991 | EP0426399A2 Segmented bias coil for magneto-optical recording |
| 05/07/1991 | US5014254 Magneto-optical recording method and magneto-optical recording apparatus |
| 05/07/1991 | US5014253 Optical pick-up for selective playback and recording on a magneto-optically recorded medium |
| 05/07/1991 | US5014252 Over write capable magnetooptical recording method using two beams, and magnetooptical recording apparatus therefor |
| 05/02/1991 | WO1991006099A1 Method and device for writing and reading information from a support based on ferroelectric material |
| 05/02/1991 | WO1991006097A1 Device for adjusting focal point of an optical pickup device |
| 05/02/1991 | EP0425375A2 Magneto-optical recording medium |
| 05/02/1991 | EP0425125A2 System with a multi-function optical disk and drive for it |
| 05/02/1991 | EP0424809A2 Magneto-optical recording medium |
| 05/01/1991 | CN1051102A Magnetic-light recording carries |
| 04/30/1991 | US5012463 Optical read/write storage system for flexible media having bernoulli stabilization at the optical head |
| 04/30/1991 | US5011248 Thin-film optical function element, and optical head using the same |
| 04/24/1991 | EP0423418A2 Magnetooptical recording media |
| 04/24/1991 | CN1050939A Method and device for writing and reading information using corrier based on ferroelectric material |
| 04/23/1991 | US5009762 Sputtering barium titanate and strontium titanate with adjusting target of titanium or titanium oxide |
| 04/18/1991 | WO1991005345A1 High resolution magnetooptical reading head |
| 04/17/1991 | EP0422947A2 Optical recording/reproducing device |
| 04/17/1991 | EP0422923A2 Magnetic head for magneto-optical recording and magneto-optical recording head |
| 04/17/1991 | EP0422783A2 Magneto-optical recording |
| 04/16/1991 | US5008888 Semiconductor laser driving apparatus |
| 04/16/1991 | US5008873 Tilt adjustment mechanism for object lens driving device |
| 04/16/1991 | US5008176 Information recording medium having a glass substrate |
| 04/10/1991 | EP0421874A1 High-resolution magneto-optical playback head |
| 04/10/1991 | EP0421768A2 External magnetic field generating device for optical magnetic disk apparatus |
| 04/10/1991 | CN1050634A Imformation processor and disk memory used in same |
| 04/09/1991 | US5007039 Optical information recording/reproducing apparatus |
| 04/09/1991 | US5007021 Magneto-optical data reading apparatus |
| 04/09/1991 | US5006935 Charge latent image recording reproducing system with a uniformly charge detection region providing a reference intensity of a recorded object |
| 04/03/1991 | EP0420694A2 Magneto-optical storage system |
| 04/03/1991 | EP0420591A2 An apparatus for reproducing information from a magneto-optical storage medium |
| 04/03/1991 | EP0420587A2 Over-write capable magnetooptical recording medium |
| 04/03/1991 | EP0420475A2 Focus capture method for magneto-optic disk drives |
| 04/03/1991 | EP0420112A2 Information processor and disk memory used in the same |
| 04/03/1991 | EP0419955A2 Magneto-optical disk storage system with erase and write/read laser device |
| 04/03/1991 | CN1050456A Optical-light recording medium |
| 04/02/1991 | US5005164 Recording and reproducing apparatus |
| 04/02/1991 | US5005093 Recording and/or reproducing apparatus with cartridge lock mechanism |
| 04/02/1991 | US5004326 Magneto-optical information reproducing apparatus having a polarizing beam splitter disposed with an inclination of 45 degrees |
| 03/27/1991 | EP0419295A2 Optical memory device |
| 03/27/1991 | EP0419269A2 Magnetooptical recording method and apparatus used therefor |
| 03/27/1991 | EP0419239A2 Information-recording method and medium |
| 03/27/1991 | EP0419169A2 Magneto-optical recording medium |
| 03/27/1991 | EP0419027A2 System and method for compensating asymmetric beam energy distribution during focussing |
| 03/27/1991 | EP0418702A2 Disk drive apparatus having improved initialization process |
| 03/27/1991 | EP0290522B1 Device for generating and detecting magnetic material structures at atomic levels |
| 03/27/1991 | CN1050281A Holding device for a record in a magneto-optical recording-and/or reproducing-set |
| 03/27/1991 | CN1050276A Method of apparatus for writing and reading a megneto-optical record carrier |
| 03/27/1991 | CN1012251B Method and apparatus fur sensing picture |
| 03/26/1991 | US5003525 Apparatus for reading a magneto-optical disk |
| 03/26/1991 | US5003521 Optical disk discriminating device |
| 03/20/1991 | EP0418100A2 Information reproducing device |
| 03/20/1991 | EP0418087A2 Optical Head |
| 03/20/1991 | EP0417858A1 Method of and apparatus for writing and reading a magneto-optical record carrier |
| 03/20/1991 | CN1012115B Optical scanner |
| 03/19/1991 | US5001698 Read-out information signal processing circuit in an optical recording and reproducing system |
| 03/19/1991 | US5001695 Optical information processing apparatus for stopping tracking and/or focusing controls in an area having preformat signal recorded therein |
| 03/19/1991 | US5001694 Tracking and focus actuator for a holographic optical head |
| 03/19/1991 | US5001692 Optical recording system providing a recording signal waveform adapted to the recording characteristics of the record carrier, and recording apparatus and record carrier for use in such systems |
| 03/19/1991 | US5001409 Surface metrological apparatus |
| 03/19/1991 | US5001333 Method and apparatus for focus error compensation having path length independence |
| 03/19/1991 | US5000834 Facing targets sputtering device |
| 03/13/1991 | EP0416920A2 Information processing method and information processing device |
| 03/13/1991 | EP0416656A2 Magneto-optical playback method |
| 03/12/1991 | US4999825 Recording/reading apparatus for inscribable record carrier and its manufacture |
| 03/12/1991 | US4999824 Magneto-optical memory device |
| 03/12/1991 | US4999260 Magneto-optical recording medium comprising a rare-earth-transition metal dispersed in a dielectric |
| 03/07/1991 | WO1991003047A1 Record holder for a magneto-optical recording and/or playback device |
| 03/06/1991 | EP0415764A2 Scanning tunneling microscope memory utilizing optical fluorescence of substrate for reading |
| 03/06/1991 | EP0415763A2 Scanning tunneling microscope utilizing optical fluorescent for reading |
| 03/06/1991 | EP0415721A2 Modulated magnetic field generator |
| 03/06/1991 | EP0415543A2 Half-height magneto-optic disk drive |
| 03/06/1991 | EP0415449A2 Playback method for magnetooptical recording |
| 03/06/1991 | EP0415443A2 Composite magneto-optical information recording media |