| 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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| 06/17/1997 | US5640383 Apparatus and method for reproducing data from a record medium |
| 06/17/1997 | US5640379 Photomagnetic recording device and photomagnetic reproducing device |
| 06/17/1997 | US5640378 Disc recording apparatus for recording data in units of a full cluster |
| 06/17/1997 | US5640374 Magneto-optical recording medium having intermediate layer of in-plane magnetization and method of reproducing from the medium |
| 06/17/1997 | US5640285 Information recording medium encoded to enable track following |
| 06/17/1997 | US5639567 Storage layer and biasing layer with differing compensation temperatures and curie temperatures |
| 06/17/1997 | US5639563 Magneto-optical recording medium |
| 06/10/1997 | US5638351 Recording and/or reproducing apparatus for recording medium |
| 06/10/1997 | US5638344 Magneto-optic recording and reproducing apparatus |
| 06/10/1997 | US5638103 Method for recording and reproducing information, apparatus therefor and recording medium |
| 06/10/1997 | US5637411 Magneto-optical recording medium and process for producing the same |
| 06/10/1997 | US5637394 Magneto-optical recording medium and method of reproducing magneto-optical information using thereof |
| 06/10/1997 | US5637370 Information storage device |
| 06/04/1997 | EP0777222A1 Optical pickup having two objective lenses |
| 06/04/1997 | EP0777216A2 A high density optical disk and a method of high density recording |
| 06/04/1997 | EP0408763B1 Optical disk and method of manufacturing the same |
| 06/03/1997 | US5636201 Optical disk memory for recording reproducible information |
| 06/03/1997 | US5636191 Positioning control system utilizing optical beam having servo-error signal generating circuit |
| 06/03/1997 | US5636187 Magnetooptical recording apparatus and magnetooptical recording method for canceling leakage magnetic fields associated with a recording medium and devices ancillary to the recording medium |
| 06/03/1997 | US5635310 ZnS dielectric thin film and magnetic recording medium |
| 06/03/1997 | US5635309 Magneto-optical recording medium |
| 06/03/1997 | US5635296 Magnetic layer made of dysprosium, gadolinium, iron, cobalt alloy; high density recording |
| 05/29/1997 | WO1997019450A1 Magnetic head apparatus and recording and/or reproducing apparatus of disk-like recording medium |
| 05/28/1997 | EP0775999A1 Device and method for reproducing information |
| 05/28/1997 | CN1150857A Information-reading process |
| 05/27/1997 | US5634031 Optical disk system having table-of-contents information data |
| 05/27/1997 | US5633851 A scanning device producing a first and a second scanning spot which move in different directions and an apparatus containing that device which uses the first spot for reading and/or recording and the second spot to monitor such reading and/or recording |
| 05/27/1997 | US5633841 Optical disc recording/reproducing apparatus having automatic protection of previously recorded data |
| 05/27/1997 | US5633838 Magneto-optical recording medium having two reproduction layers and a method for reproducing thereof |
| 05/27/1997 | US5633746 Magneto-optical recording medium |
| 05/21/1997 | CN1150300A Reproducing method and reproducing apparatus of recording medium |
| 05/20/1997 | US5631890 Light modulation method for optical disk drive device |
| 05/20/1997 | US5631887 Pulse width modulation optical disk drive with adjustable pulsed laser write and preheat patterns |
| 05/20/1997 | US5631817 Load current control of pulse width modulated drive signal including calibration and correction coefficient |
| 05/20/1997 | US5631774 Polarizing beam splitter and optical pick-up head comprising the same |
| 05/20/1997 | US5631096 Magneto optical memory device |
| 05/20/1997 | US5630886 Corrosion-resistant film for protecting surfaces of Ag and corrosion-resist composite structures |
| 05/15/1997 | DE19646896A1 High-density magneto=optical recording medium |
| 05/15/1997 | DE19646432A1 Injection moulding of e.g. carbonate] optical data disks in multiple cavities without pre-drying plastic |
| 05/14/1997 | EP0773543A2 Optical recording method with stabilized data overwriting using laser beam intensity settings |
| 05/14/1997 | EP0773542A2 Multiple data surface optical medium and data storage system |
| 05/14/1997 | EP0773541A2 Multiple data surface optical medium and data storage system |
| 05/14/1997 | EP0773540A2 Stabilised optical overwriting method using laser beam intensity settings |
| 05/14/1997 | EP0772874A1 Internally-damped rotatable information-storage article |
| 05/13/1997 | US5630165 Servo system controlled by master and second processors through memory being accessed for read and write by processors in separate portions respectively |
| 05/13/1997 | US5629922 Electron tunneling device using ferromagnetic thin films |
| 05/13/1997 | US5629919 Optical had |
| 05/13/1997 | US5629916 Optical information reproducing device forming light spot on photo-detector with major axis along push-pull signal detection |
| 05/13/1997 | US5629913 Optical disk recording control method and apparatus for recording user data based on test signal |
| 05/13/1997 | US5629912 Apparatus for reproducing signals recorded on an optical disc |
| 05/13/1997 | US5629911 Optical information recording/reproduction apparatus including an integrated photodetector used in the detection of focusing and/or tracking error signals |
| 05/13/1997 | US5629909 Magneto-optical recording medium with initializing layer for initializing different regions in different directions |
| 05/13/1997 | US5629908 Magneto-optical recording medium having magnetization variable between in-plane magnetization and perpendicular magnetization |
| 05/09/1997 | WO1997016783A1 Methods and apparatus for controlling access to a recording disk |
| 05/07/1997 | EP0715714B1 A measuring device for measuring the intensity and/or polarization of electromagnetic radiation, for determining physical properties of a preparation, and for reading information from a storage medium |
| 05/07/1997 | EP0458975B1 Optical recording apparatus |
| 05/07/1997 | DE19644973A1 Optic reception device for data recording arrangement |
| 05/06/1997 | US5627818 Optical disk with marks used for calibrating an optical detector to minimize noise from undesired perturbations in disk surfaces |
| 05/06/1997 | US5627816 Multilayer optical disk and apparatus |
| 05/06/1997 | US5627815 Precision machining method precision machining apparatus and data storage apparatus using the same |
| 05/06/1997 | US5627812 Optical head apparatus and diffraction element having at least two diffractive surfaces |
| 05/06/1997 | US5627810 Recording/reproducing apparatus that forms read and write clock signals with differing frequencies from the servo clock signals |
| 05/06/1997 | US5627806 For recording and reproducing information |
| 05/06/1997 | US5627804 Magneto-optical recording apparartus including a magnetic head having a core composed of a single crystal ferrite material |
| 05/06/1997 | US5627803 Magneto optical recording medium including a plurality of magnetic layers and a method for reducing thereof |
| 05/06/1997 | US5627777 Magneto-optical recording medium |
| 05/06/1997 | US5626973 Magneto-optical layer and magneto-optical recording medium |
| 05/06/1997 | US5626965 Magnetooptical recording medium |
| 05/02/1997 | EP0770996A2 Amorphous alloy of light rare earth-transition metal and semi-metal, magneto-optical recording layer and magneto-optical disk adopting the layer |
| 05/02/1997 | EP0516125B1 Disk apparatus |
| 05/01/1997 | WO1997015812A1 Polarization sensitive photodetectors and detector arrays |
| 05/01/1997 | CA2235922A1 Polarization sensitive photodetectors and detector arrays |
| 05/01/1997 | CA2187602A1 Optical disc recording medium |
| 04/30/1997 | DE19539530A1 Producing divalent samarium from samarium of other valency |
| 04/30/1997 | CN1148899A Optical signal detection circuit |
| 04/30/1997 | CN1148716A Device for demodulating digital frequency-modulation signal of optical-disc apparatus |
| 04/29/1997 | US5625725 Magneto-optical pickup device having phase compensating circuitry |
| 04/29/1997 | US5625620 Optical disc |
| 04/29/1997 | US5625612 Disc cartridge loading apparatus |
| 04/29/1997 | US5625611 Method of recording on a recording medium employing an automatic updating of management data by monitoring the signal being recorded |
| 04/29/1997 | US5625610 Optical disc dubbing apparatus |
| 04/29/1997 | US5625607 Magneto-optical disk apparatus including two magnetic field applying devices, one of which has a substantial ring-shaped core member with a gap in a portion thereof |
| 04/29/1997 | US5625388 Overwritable optical recording medium and recording method of the same |
| 04/24/1997 | WO1997015052A1 Apparatus for recording data on and/or reproducing data from a recording medium and a method of recording data on and/or reproducing data from a recording medium |
| 04/24/1997 | DE19640014A1 Magneto-optical recording carrier |
| 04/23/1997 | EP0769776A1 Tracking servo apparatus for optical discs |
| 04/23/1997 | CN1148242A Automatic editing/recording device and dubbing system loaded with device |
| 04/23/1997 | CN1147983A Mold for pressing and molded glass substrate for computer memory by using it |
| 04/22/1997 | US5623476 Recording device and reproduction device |
| 04/22/1997 | US5623475 Method of inscribing and readout of information in an information storage layer |
| 04/22/1997 | US5623472 Method and apparatus for recording signals on a record carrier, measurement method and measurement device for use in the recording method and the recording apparatus, and record carrier |
| 04/22/1997 | US5623464 Optical disk apparatus and seek control method |
| 04/22/1997 | US5623463 Method for determining a focusing control operation position in an opto-magnetic disc recording/reproducing apparatus |
| 04/22/1997 | US5623462 Optical information recording/reproducing apparatus |
| 04/22/1997 | US5623458 Method for reproducing information data recorded on a magneto-optical device having plural magnetic layers |
| 04/22/1997 | US5623457 Photomagnetic disc drive system having a locking mechanism |
| 04/22/1997 | US5623295 Information recording reproducing apparatus using probe |
| 04/17/1997 | WO1997014140A1 Transducer supporting apparatus |
| 04/16/1997 | EP0768656A2 Magnetooptical recording medium and recording method and apparatus using the medium |
| 04/16/1997 | EP0768655A2 Sliding-type magnetic head for magnetooptical recording |