| 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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| 03/09/1994 | EP0586189A2 Data recording apparatus and methods |
| 03/09/1994 | EP0586175A1 A magnetooptical recording medium and information recording and reproducing methods using the recording medium |
| 03/09/1994 | EP0586122A1 Magneto-optical memory device |
| 03/09/1994 | EP0586084A2 Reproducing apparatus |
| 03/09/1994 | EP0321314B1 Optical disc |
| 03/08/1994 | US5293569 Magneto-optical recording/reproducing apparatus including an optical head with an optical element having a plurality of prisms |
| 03/08/1994 | US5293371 Optical head for a magneto-optical information reproducing apparatus including a light beam splitter having a first glass, a uniaxial crystal and a second glass arranged in sequence |
| 03/08/1994 | US5293361 Information processing method and apparatus therefor in which an erasing device is driven for a period longer than a necessary period |
| 03/08/1994 | US5293360 Magnetic field generating device |
| 03/08/1994 | US5293359 Magnetic recording and reproducing apparatus having a ferrimagnetic recording medium, a magnetic head and first and second light sources |
| 03/08/1994 | US5293291 Optical integrated device for magneto-optical reproducing head |
| 03/08/1994 | US5292592 Optical information recording medium in which a protective layer comprises a Ni-Cr alloy layer |
| 03/08/1994 | US5292568 Electroconductive particles |
| 03/08/1994 | CA1327645C Device for reversible optical data storage |
| 03/03/1994 | WO1994005011A1 Optoelectronic memories with photoconductive thin films |
| 03/03/1994 | DE4329143A1 High density optical disc - stores information for reading by two polarising light beams operating on two substrates as deflection layers for even and odd tracks respectively |
| 03/02/1994 | EP0584989A2 Magnetic head for magnetooptical recording and method for producing the same |
| 03/02/1994 | EP0584834A2 Optical disc recording/reproducing apparatus |
| 03/02/1994 | CN1083252A Zoned record carrier |
| 03/02/1994 | CN1023921C Circuit for reversing magnetic field |
| 03/01/1994 | US5291462 Optical disk having playback parameters recorded thereon and method for using same |
| 03/01/1994 | US5291345 Apparatus for applying magnetic field and magneto-optical disk storage having such apparatus |
| 02/23/1994 | EP0583720A2 Magnetooptical recording medium |
| 02/23/1994 | EP0583416A1 Optical data storage and retrieval system and method |
| 02/22/1994 | US5289408 Memory apparatus using tunnel current techniques |
| 02/17/1994 | WO1994003892A1 Magneto-optic recording medium and method of its manufacture method |
| 02/17/1994 | WO1994003891A1 Device and method for disc recording |
| 02/16/1994 | EP0582996A1 Light-amount control device for an optical-disk recording reproduction apparatus |
| 02/16/1994 | EP0582948A1 Reduction of noise component in data signal and optical pick-up |
| 02/16/1994 | EP0436018B1 Disk-like recording medium |
| 02/16/1994 | EP0352333B1 Data recording medium |
| 02/16/1994 | CN1082233A Recording and reproduction of items of information using rom-ram storage media |
| 02/16/1994 | CN1023844C Method of and device for providing record carrier with pattern of areas having modified optical properties |
| 02/15/1994 | US5287335 Optical disk device for record and reproduction of additional information besides reproduction of basic one |
| 02/15/1994 | US5287334 Magneto-optical pickup apparatus and magneto-optical recording/reproducing apparatus |
| 02/15/1994 | US5287302 Superconducting optically reconfigurable magnetic device |
| 02/09/1994 | EP0582446A2 Optical data recording/reproducing apparatus and storage medium for it |
| 02/09/1994 | EP0582059A2 Magneto-optical head assembly |
| 02/09/1994 | CN1081769A Magneto-optical recording materials system |
| 02/08/1994 | US5285440 Magneto-optic disk |
| 02/03/1994 | WO1994002940A1 Magneto-optical recording materials system |
| 02/03/1994 | WO1994002939A1 Reading and writing stored information by means of electrochemistry |
| 02/03/1994 | WO1994002841A1 Multiple source and detection frequencies in detecting atomic or molecular spectra and/or threshold phenomena associated with the same |
| 02/03/1994 | WO1994002840A1 System for detecting atomic or molecular spectra of a substance, and/or threshold phenomena associated with the same |
| 02/03/1994 | CA2141308A1 Magneto-optical recording materials system |
| 02/02/1994 | EP0581597A2 An optical information reproducing device |
| 02/01/1994 | US5283779 Rewritable optical disc |
| 02/01/1994 | US5283775 Split detector system for direct read-while-write operation on magneto-optic media |
| 02/01/1994 | US5283770 Method of recording information on and reproducing information from magneto-optical recording medium |
| 02/01/1994 | US5283133 Magneto-optical disk |
| 01/26/1994 | EP0579843A1 Phase varying device, and optical pickup apparatus using the same for magneto-optical storage |
| 01/26/1994 | EP0426763B1 Bias field switching system for magneto-optic disk drive |
| 01/25/1994 | US5282190 Data storage disk drive with a piezoelectric member and a resilient member between a head and a disk |
| 01/25/1994 | US5282188 Apparatus and method for optimizing performance in read/write head of an optical storage system with a magneto-optical storage medium |
| 01/25/1994 | US5282184 Focus control device of an optical disk apparatus |
| 01/25/1994 | US5282095 Direct over-write magneto-optical recording medium having multiple recording layers, and method of recording new information by directly overwriting pre-existing recorded information on such medium |
| 01/25/1994 | US5281814 System for imaging and detecting threshold phenomena associated with and/or atomic or molecular spectra of a substance by reflection of an AC electrical signal |
| 01/25/1994 | US5281797 Short wavelength optical disk head having a changeable aperture |
| 01/25/1994 | CA1326549C Disc cartridge |
| 01/25/1994 | CA1326548C Magneto-optical memory element |
| 01/25/1994 | CA1326547C Thermomagnetic recording method |
| 01/20/1994 | WO1994001794A1 Polarizing element and optical element, and optical head |
| 01/20/1994 | DE4323437A1 Prodn. of magnet-optical recording medium, e.g. disk - using multi-layer recording film formed from thin films of at least two or more types which are stacked alternatingly several times on substrate in sputter system |
| 01/18/1994 | US5280464 Optical disk apparatus having a focusing error correcting system |
| 01/18/1994 | US5279877 Magneto optical disc |
| 01/13/1994 | DE4327685A1 Magnetic tape recording with optical head input - provided by head mounted on steel tape moving linearly along angled track relative to magnetic tape |
| 01/12/1994 | EP0578227A2 High density recording method for magneto-optical disc and magneto-optical recording and reproducing apparatus |
| 01/11/1994 | US5278818 Magneto-optical recording circuitry for reversing a magnetic field |
| 01/11/1994 | US5278817 Optical pick-up for use with an opto-magnetic signal |
| 01/11/1994 | US5278812 Tracking and focussing functions in optical disk apparatus |
| 01/11/1994 | US5278811 Magneto-optic recording and playback system |
| 01/11/1994 | US5278810 Magneto-optical recording medium whereon recording is carried out with an overwriting function |
| 01/11/1994 | US5278809 Photomagnetic recording apparatus recording with alternating magnetic field and D.C. magnetic field |
| 01/11/1994 | US5278713 Cooling device including ribs, in combination with a magnetic head |
| 01/11/1994 | US5278401 Optical disc apparatus having five light receiving areas for detecting focus error and tracking error |
| 01/05/1994 | EP0577369A2 Optical head and optical information reading apparatus |
| 01/05/1994 | EP0577214A2 Zoned record carrier |
| 01/05/1994 | CN1023430C Method and apparatus for recording signals on a record carrier, measurement method and device for use in the recording method and apparatus, and record carrier |
| 01/04/1994 | US5276665 Magneto-optical disk recording and reproducing apparatus capable of reproducing a plurality of disk types |
| 01/04/1994 | US5276663 Optical information recording-reproducing apparatus including a condensing lens secured to a lens barrel |
| 01/04/1994 | CA1325848C Arrangement of recording/reproducing apparatus |
| 12/29/1993 | EP0576331A1 Integrated optical device for the supervision of the focus and position of an image |
| 12/29/1993 | EP0576292A2 Magneto-optical layer and magneto-optical recording medium |
| 12/29/1993 | EP0576286A2 Magnetic head driving device and magnetooptical recording apparatus |
| 12/29/1993 | EP0576245A2 Magneto-optic recording apparatus and method therefor |
| 12/29/1993 | EP0576072A1 Polarization-sensitive beam splitter, method of manufacturing such a beam splitter and magneto-optical scanning device including such a beam splitter |
| 12/29/1993 | EP0575963A2 Method for detecting a signal recorded on an optical recording medium |
| 12/29/1993 | EP0575934A2 Recording and reproduction of information in ROM-RAM storage media |
| 12/29/1993 | EP0575738A2 System and method for improving long term stability of exchange-coupled optical media |
| 12/29/1993 | EP0327636B1 Improved apparatus for magneto-optical recording |
| 12/28/1993 | US5274617 Method and device for data management in an optical recording medium |
| 12/28/1993 | US5274612 Information processor and disk memory used in the same |
| 12/28/1993 | US5274070 Iron-Schiff base magnetic polymers and process thereof |
| 12/28/1993 | US5273836 Magnetooptic recording material |
| 12/28/1993 | US5273835 Over-write capable magnetooptical recording medium |
| 12/28/1993 | CA1325676C External magnetic field device for a magnetooptical information recording and reproducing apparatus |
| 12/26/1993 | CA2098950A1 Magneto-optical layer and magneto-optical recording medium |
| 12/24/1993 | CA2097858A1 Magneto-optical recording medium |
| 12/23/1993 | WO1993026004A1 Apparatus for and method of verifying etching of optical servo information on magnetic media |
| 12/23/1993 | WO1993026003A1 Simultaneous mo and rom optical disk signal detection |