| 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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| 03/04/1992 | EP0473305A1 Disc-shaped recording media and recording/reproducing apparatus therefor |
| 03/04/1992 | EP0473301A2 Method and apparatus for determining sector status in a disk data storage device |
| 03/04/1992 | CN1059223A Disc-shapeo recording medium and recording reproducing apparatus therefor |
| 03/04/1992 | CN1059222A Recording and/or reproducing apparatus for optical disk |
| 03/03/1992 | US5093822 High-density magnetic recording and optical reproducing apparatus |
| 03/03/1992 | US5093819 System having optical disk and disk drive unit |
| 03/03/1992 | US5093817 Method and apparatus for recording information on an opto-magnetic recording medium by applying a modulated light beam while applying a magnetic field alternating with a constant period |
| 03/03/1992 | US5093816 Optical magnetic recording and reproducing system |
| 03/03/1992 | US5093174 Aluminum and gold alloy reflecting layer; durability |
| 02/27/1992 | DE4026875A1 Optische abtastvorrichtung Optical scanning device |
| 02/26/1992 | EP0472377A2 Magneto-optical method and apparatus for recording/reproducing data |
| 02/26/1992 | EP0472188A1 Magnetic head |
| 02/26/1992 | EP0471851A1 Electrostatic information recording medium |
| 02/25/1992 | US5091901 Disc cartridge with dual identification elements |
| 02/25/1992 | US5091897 Magneto-optical recording apparatus having means for delaying an input signal for preventing bit shift |
| 02/25/1992 | US5091896 Method and apparatus for magneto-optical recording using a demagnetization field and erasing using external magnetic field |
| 02/25/1992 | US5091880 Memory device |
| 02/25/1992 | US5091267 With coating film containing silicon, nitrogen, hydrogen; durability, sensitivity, refractive index |
| 02/25/1992 | CA1296425C Method of recording a binary signal on an optically readable record carrier and apparatus for carrying out the method |
| 02/20/1992 | WO1992002931A1 Thermomagnetic recording system having high storage density and direct-overwrite capability |
| 02/19/1992 | EP0471527A2 Magnetic recording medium and information recording-reproduction method using the same |
| 02/19/1992 | EP0471511A2 Cantilever type probe and information processing device equipped with said probe |
| 02/19/1992 | CN1015577B Circuit arrangement for inverting magnetic field |
| 02/18/1992 | US5090002 Positioning systems employing velocity and position control loops with position control loop having an extended range |
| 02/18/1992 | US5089358 Optical recording medium |
| 02/12/1992 | EP0470863A1 A magnetic recording and reproducing apparatus |
| 02/12/1992 | EP0470862A1 Method and material for magneto-optical recording |
| 02/12/1992 | EP0470826A1 Magneto-optical recording system |
| 02/12/1992 | EP0470546A1 Magneto-optical recording medium |
| 02/11/1992 | US5088085 Magneto-optic disk unit having means for preventing erroneous insertion of disk cartridge |
| 02/11/1992 | US5088074 Magnetooptical recording apparatus with parts arranged to minimize height |
| 02/11/1992 | US5087532 Substrate with magneto-optic storage and magnetic biasing layers separated by insulating layer; one step |
| 02/11/1992 | US5087340 Rare earth, transition metal alloy between dielectric layers |
| 02/05/1992 | EP0469879A2 Information recording device and information recording method |
| 02/05/1992 | EP0469727A1 Optical disc record/playback apparatus |
| 02/05/1992 | EP0469623A2 Optical magnetic disk |
| 02/05/1992 | EP0469580A2 Optical pickup apparatus |
| 02/05/1992 | EP0469579A2 Optical disc recording apparatus |
| 02/05/1992 | EP0469565A2 Apparatus for reading and/or inputting information |
| 02/05/1992 | EP0469552A2 Optical pickup device |
| 02/04/1992 | US5085496 Optical element and optical pickup device comprising it |
| 01/29/1992 | EP0468800A1 Optical head for magneto-optical information reproducing apparatus |
| 01/29/1992 | EP0468391A2 Magneto-optic recording medium |
| 01/28/1992 | US5084860 Apparatus for optical disc memory with correction pattern and master disc cutting apparatus |
| 01/28/1992 | US5084850 Apparatus for detecting focus error signal |
| 01/23/1992 | WO1992001286A1 Circuit arrangement for reversing a magnetic field |
| 01/23/1992 | WO1992001285A1 Circuit for reversing a magnetic field |
| 01/22/1992 | EP0467705A1 Optical disk |
| 01/22/1992 | EP0467216A2 Optical head and optical recording and reproducing device |
| 01/21/1992 | US5082749 Platinum or palladium/cobalt multilayer on a zinc oxide or indium oxide layer for magneto-optical recording |
| 01/21/1992 | US5082690 Process for manufacturing a magneto-optic disc |
| 01/16/1992 | DE4022410A1 Magnetic field reversing circuit with coil - couples inductance terminal to supply voltage source pole via third controllable switch |
| 01/16/1992 | DE4022400A1 Schaltungsanordnung zur umkehrung eines magnetfeldes Circuit arrangement for the reversal of a magnetic field |
| 01/15/1992 | EP0466073A2 Recording and/or reproducing apparatus and disk cartridge loaded therein |
| 01/15/1992 | EP0465859A2 Magnetooptical recording method, and apparatus used in the method |
| 01/15/1992 | EP0465676A1 Magneto-optical recording/reproducing apparatus |
| 01/14/1992 | US5081615 Method of coupling external light into an optical waveguide and a guided wave from an optical waveguide and optical pickup employing an optical waveguide |
| 01/14/1992 | US5081614 Magneto-optical head utilizing central and peripheral portions of reflected light flux for different purposes |
| 01/14/1992 | US5080945 Large-capacity-memory disk |
| 01/08/1992 | EP0465269A2 Magneto-optical disk and manufacturing method thereof |
| 01/08/1992 | EP0465054A1 Communications processor |
| 01/08/1992 | EP0464947A1 Device for inscribing and/or reading a magneto-optical information carrier |
| 01/08/1992 | EP0464674A2 Magneto-optical disc |
| 01/08/1992 | EP0464536A2 Method for storage of information units in nanometre range |
| 01/08/1992 | EP0464216A1 Method of recording and reproducing data |
| 01/04/1992 | CA2046063A1 Storage of information units in the nanometer range |
| 01/02/1992 | EP0463728A2 Increasing storage density of information storage media |
| 01/02/1992 | EP0463382A2 Method of making double-sided magneto-optical disks having reduced birefringence |
| 01/02/1992 | EP0380532B1 Preparation of thin layers of iron iii oxide for optical and/or magnetic recording |
| 12/31/1991 | US5077723 Optical pick-up apparatus which utilizes plural prisms |
| 12/31/1991 | US5077718 Optical information processing method and apparatus in which malfunctioning during tracking servo pull-in is prevented |
| 12/31/1991 | US5077714 Magneto-optical recording and reproducing device using the modulation of intensities of the magnetic field and light beam |
| 12/31/1991 | US5077713 Magneto-optical disk writing/reading apparatus including a floating magnetic head |
| 12/30/1991 | CA2043969A1 Increasing storage density of information storage media |
| 12/27/1991 | EP0462843A2 Magneto-optical method and apparatus for recording/reproducing data |
| 12/27/1991 | EP0462757A2 Polarization diffraction element and polarization detector employing the same |
| 12/26/1991 | WO1991020084A1 Spatial optical modulator |
| 12/18/1991 | EP0461911A2 Magneto-optical disk and manufacturing methods thereof |
| 12/18/1991 | EP0461132A1 Circuit arrangement for reversing a magnetic field. |
| 12/17/1991 | US5073888 Optical pickup device |
| 12/17/1991 | US5073884 Tracking apparatus having movable and stationary parts |
| 12/17/1991 | US5073880 Information recording/reproducing method and apparatus |
| 12/17/1991 | US5073879 Information processing apparatus using a beam splitting means having non-polarization beam split surface |
| 12/17/1991 | US5073101 Information recording medium, production process and molding die for substrate therefor |
| 12/12/1991 | WO1991019025A1 Process for the measurement of the thickness and refractive index of a thin film on a substrate, and a device for carrying out the process |
| 12/12/1991 | DE4018308A1 High density digital data storage - using locally polarised piezoelectric film |
| 12/11/1991 | EP0460916A2 Format and method for recording digital data on record disks with a pre-erasure need to save extra rotations |
| 12/11/1991 | CN1056944A Magnetooptical recording medium |
| 12/10/1991 | US5072432 Magnet turn-over mechanism for recording and/or erasing an information on and from a magneto-optical disk by selectively applying a first and a second predetermined magnetic fields |
| 12/10/1991 | US5072431 Magneto-optical disk recording apparatus |
| 12/10/1991 | US5071673 Method for producing optical disc |
| 12/04/1991 | EP0459309A2 Magneto-optical disk |
| 12/04/1991 | EP0458975A1 Optical recording apparatus |
| 12/04/1991 | EP0370067B1 Preparation of thin layers of iron iii oxide for optical and/or magnetic recording |
| 12/03/1991 | US5070496 Laser reproducing apparatus |
| 12/03/1991 | US5070495 Write calibration for magnetooptic disk recorders |
| 12/03/1991 | US5070494 Optical pickup device with dual-mode drive mechanism |
| 12/03/1991 | US5070493 Wedge prism assembly for optical information storage |
| 12/03/1991 | US5070492 Signal decoding apparatus and method |
| 12/03/1991 | US5070487 Magneto-optic media recording system including a directed magnetic bias flux |