| 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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| 09/21/1993 | US5247493 Magneto-optical recording and reproducing disk device having a bimorph type actuator with specific structures for mounting a magnetic head in opposing to the surface of the disk |
| 09/21/1993 | US5247167 Multiple beam power monitoring system and method with radiation detection and focusing means of overlapping beams |
| 09/21/1993 | US5245736 Vacuum process apparatus |
| 09/21/1993 | CA1322408C Thermomagnetic recording method applying power modulated laser on a magnetically coupled double layer structure of perpendicular anisotropy film |
| 09/16/1993 | WO1993018514A1 Method and device for recording-reading information on a moving optical or magneto-optical medium |
| 09/16/1993 | WO1993018512A1 Double-sided magneto-optical media for a multi-disk storage device |
| 09/16/1993 | WO1993018510A1 Remote fine positioning mechanism |
| 09/15/1993 | EP0560625A2 A magneto-optic memory medium and a method for producing the same |
| 09/14/1993 | US5245595 Zone miss recovery system for disk drives using a modified constant angular velocity (MCAV) method of data recording |
| 09/14/1993 | US5245491 Magneto-optical head employing optical fiber connected stationary and movable portions |
| 09/08/1993 | EP0559469A2 Magnetic head driving device and magnetooptical recording apparatus |
| 09/08/1993 | EP0559452A2 Optical read/write head and optical device for use therewith |
| 09/08/1993 | EP0559449A2 Optical disk, optical disk unit and optical disk producing method |
| 09/08/1993 | EP0559391A2 Magnetooptical recording/reproducing apparatus |
| 09/08/1993 | EP0559177A2 Magnetic head for magneto-optical recording |
| 09/08/1993 | EP0559104A2 Optical disc recording apparatus |
| 09/07/1993 | USH1233 Optical integrated device for a reproducing head for magneto-optical record |
| 09/07/1993 | US5243580 Head for a magneto-optical recording apparatus |
| 09/02/1993 | WO1993017418A1 Method and device for optically reading a sound recording on a grooved recording medium |
| 09/01/1993 | EP0558184A2 Beam splitter |
| 09/01/1993 | EP0558052A1 Optical pickup for an optical disc player |
| 09/01/1993 | EP0557798A1 Read-write head of a magneto-optical disc player |
| 09/01/1993 | EP0557797A1 Read-write head of an magneto-optical disc player |
| 09/01/1993 | EP0411120B1 Laser reproduction apparatus |
| 08/31/1993 | US5241527 Recording and reproducing apparatus and method using a recording layer having a positioning region |
| 08/31/1993 | US5241520 System and method of reproducing signals recorded on a magneto-optic recording medium |
| 08/31/1993 | US5241165 Erasable optical wallet-size data card |
| 08/31/1993 | US5240784 Magnetooptical recording medium |
| 08/31/1993 | US5240581 Sputtering a silicon nitride layer, having a controlled refractive index, on a disk |
| 08/25/1993 | EP0557212A2 Apparatus and method for optimizing performance in read/write head of an optical storage system with a magneto-optical storage medium |
| 08/25/1993 | EP0557094A1 Magnetic head drive device |
| 08/25/1993 | EP0557017A1 Optical disk apparatus |
| 08/24/1993 | US5239534 Alloy composition selected from DyFeCo or TbDyFeCo |
| 08/24/1993 | US5239532 Drive arrangement for the writing/reading heads of a magneto-optical disc apparatus |
| 08/24/1993 | US5239529 Multiple beam optical disk apparatus with multiple clock extracting circuits used for monitoring and cross fading |
| 08/24/1993 | US5239524 Over write capable magnetooptical recording method, and magnetooptical recording apparatus and medium used therefor |
| 08/24/1993 | US5239504 Data storage system |
| 08/24/1993 | US5239425 Magnetic head for magneto-optical recording device |
| 08/24/1993 | CA1321644C Magneto-optical recording method and magneto-optical recording apparatus |
| 08/19/1993 | WO1993016476A1 Optical memory |
| 08/19/1993 | WO1993016469A1 Phase varying device, and optical pickup apparatus using the same for magneto-optical storage |
| 08/19/1993 | CA2130345A1 Optical memory |
| 08/18/1993 | EP0556074A2 Magnetic head device for magnetooptical disc system and magnetic head driving circuit |
| 08/18/1993 | EP0555943A2 Optical distance detector |
| 08/18/1993 | EP0555941A2 Recording device and reproducing device |
| 08/18/1993 | EP0555815A1 Disc recording apparatus |
| 08/18/1993 | EP0555801A1 Magnetic head device and magneto-optical recording and reproducing apparatus |
| 08/18/1993 | EP0555644A2 Recording and/or reproducing method for an optical disc |
| 08/18/1993 | EP0555563A2 A method for thermomagnetic encoding of permanent magnet materials |
| 08/18/1993 | EP0555562A2 Overload detection in an arrangement for recording an analog signal on a record carrier |
| 08/17/1993 | US5237560 Optical disc cartridge |
| 08/17/1993 | US5237554 Apparatus for generating clock signals for data reproduction |
| 08/17/1993 | US5237551 Apparatus measuring an output of a disk drive |
| 08/17/1993 | US5237549 Magneto-optical disk storage device having optical head applicable to different types of magneto-optical disks |
| 08/17/1993 | US5237548 Magneto-optic recording structure and method |
| 08/17/1993 | US5237547 Multi-head magneto-optical disk apparatus |
| 08/17/1993 | US5237475 Magnetic head for photo-magnetic recording |
| 08/11/1993 | EP0555049A2 Magnetooptical information recording/reproducing apparatus |
| 08/11/1993 | EP0555037A1 Magneto-optical information recording/reproducing apparatus |
| 08/11/1993 | EP0555031A2 Recording and reproducing apparatus |
| 08/11/1993 | EP0554885A2 Optical disk substrate and optical disk using the same |
| 08/11/1993 | EP0554858A2 Disc reproducing apparatus and disc recording apparatus |
| 08/11/1993 | EP0461132B1 Circuit arrangement for reversing a magnetic field |
| 08/10/1993 | US5235590 Read out apparatus for reading out information from magneto-optic disk |
| 08/10/1993 | US5235588 Magneto-optic reading and recording head using external resonator having semiconductor laser |
| 08/10/1993 | US5235573 Repositioning laser beams in information storage media |
| 08/10/1993 | US5235570 Magneto-optic readout method and apparatus using polarization switching of readout beam |
| 08/10/1993 | US5235569 Magnetooptical recording method, and apparatus used in the method |
| 08/04/1993 | EP0554065A2 Disc recording and/or reproducing apparatus |
| 08/04/1993 | EP0553938A2 Recording device and reproducing device |
| 08/04/1993 | EP0553937A2 Recording device and reproducing device |
| 08/04/1993 | EP0553816A2 Disc shaped recording medium and address discrimination circuit for disc-shaped recording medium |
| 08/04/1993 | EP0311691B1 Optical recording/reproducing apparatus |
| 08/04/1993 | CN1075024A Recording/reproducing equipment |
| 08/03/1993 | US5233597 Magneto-optical disk having a layer of varying thickness |
| 08/03/1993 | US5233590 Optical recording/reproducing apparatus including means for synchronizing the phase of a data read clock signal with data recorded on an optical recording medium |
| 08/03/1993 | US5233578 Method of recording information on a recording medium having at least two magnetic layers |
| 08/03/1993 | US5233577 Magneto-optical recording apparatus and energizing circuit for use in such a magneto-optical recording apparatus |
| 08/03/1993 | US5233575 Magneto-optical recording medium |
| 08/03/1993 | US5232790 Transparent substrate and recording layer separated by dielectric layer having refractive index varying from lower next to substrate to higher next to recording layer, warp resistance |
| 08/03/1993 | US5232567 Alternately arranging first and second metal regions on target; isolating plates to prevent mixing; sputtering on moving substrate |
| 07/28/1993 | EP0552957A2 Magneto-optical recording medium and manufacturing method thereof |
| 07/28/1993 | EP0552936A1 Optical medium recording apparatus and method |
| 07/28/1993 | EP0552903A2 Data transmitting apparatus and data reproducing apparatus |
| 07/28/1993 | CN1074765A Multilayer film materials system |
| 07/27/1993 | US5231620 Magneto-optical recording/reproducing apparatus with light beam splitting means |
| 07/27/1993 | US5231614 Magneto-optical eraser |
| 07/27/1993 | US5231613 Magneto-optical recording device |
| 07/27/1993 | US5230930 Forming multilayer element with high density magnetic pattern and forming a recording layer on a reproduction layer |
| 07/21/1993 | EP0551966A2 Recording device and reproducing device |
| 07/21/1993 | EP0551965A2 Recording device and reproducing device |
| 07/21/1993 | EP0551964A2 Recording device and reproducing device |
| 07/21/1993 | EP0551879A2 Magnetic head for magnetooptical recording and a method of manufacturing the same |
| 07/21/1993 | EP0551814A1 Surface observing apparatus and method |
| 07/20/1993 | US5229983 Bias magnetic field generating apparatus for magneto-optical recording and reproducing system |
| 07/20/1993 | US5229902 Circuitry for reversing a magnetic field |
| 07/20/1993 | US5229900 Magnetooptical disk drive having improved features for reducing the size thereof in the direction normal to the disk cartridge |
| 07/20/1993 | US5228184 Method of manufacturing thin film magnetic head |
| 07/20/1993 | CA2007262C Information recording and retrieval system |
| 07/14/1993 | EP0551133A2 Disc recording and/or reproducing apparatus |