| 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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| 05/04/1993 | US5208799 Magneto-optic recording method and magneto-optic recording/reproducing apparatus |
| 05/04/1993 | US5208797 Magneto-optical recording media and apparatus |
| 05/04/1993 | US5208792 Recording and reproducing apparatus using opto-magneto media |
| 05/04/1993 | CA1317375C Method and means for reading electronic signal patterns stored on a movable image recording surface |
| 04/28/1993 | EP0539228A2 Magneto-optical memory device whereon overwriting operation can be carried out through light intensity modulation and method for recording and erasing using it |
| 04/28/1993 | EP0539176A2 Magneto-optical recording method and magneto-optical memory device |
| 04/28/1993 | EP0539128A2 Plural-beam optical head |
| 04/28/1993 | EP0539019A1 Focusing servo apparatus for an optical disc |
| 04/28/1993 | EP0538583A1 Method for the preparation of magneto-optical recording medium |
| 04/27/1993 | US5206852 High-density recording optical head |
| 04/27/1993 | US5206844 Magnetooptic recording medium cartridge for two-sided overwriting |
| 04/27/1993 | US5206843 Apparatus for erasing information recorded on an information recording medium by applying light and a magnetic field over a plurality of recording tracks |
| 04/22/1993 | DE4134241A1 Magneto=optical mass storage module - stores discs in internal magazine rack with handling system for selection and transfer to active position |
| 04/21/1993 | EP0537952A2 Magneto-optic media and data storage systems utilising such media |
| 04/21/1993 | EP0537787A2 Optical pickup apparatus |
| 04/21/1993 | EP0537712A2 Optical pickup apparatus |
| 04/21/1993 | CN1020359C Magnetooptical recording media |
| 04/20/1993 | US5204851 Apparatus for reading and/or inputting information |
| 04/20/1993 | US5204847 Sensing previously-recorded information while recording or erasing a magnetooptic storage number |
| 04/20/1993 | US5204193 With first layer of iron, cobalt and dysprosium or terbium having predetermined Curie point and coercivity, second layer of gadolinium, iron, cobalt with higher Curie point and lower coercivity |
| 04/20/1993 | CA1316603C Optical recording medium and manufacturing method thereof |
| 04/20/1993 | CA1316599C Recording and reproducing device for magneto-optical card |
| 04/20/1993 | CA1316598C Magneto-optic memory medium |
| 04/20/1993 | CA1316597C Magneto-optical memory apparatus and optical memory apparatus |
| 04/20/1993 | CA1316595C Optical information recording and reproducing apparatus |
| 04/15/1993 | WO1993007616A1 Optical head for magneto-optical system |
| 04/14/1993 | EP0536938A2 Magnetooptical recording medium and magnetooptical record/reproducing method |
| 04/14/1993 | EP0536780A2 Method of recording information on and reproducing information from magnetooptical recording medium |
| 04/14/1993 | EP0536764A1 Disc-shaped recording medium |
| 04/14/1993 | EP0536718A2 Optical pickup apparatus |
| 04/14/1993 | EP0536404A1 Method for reproducing signal in optically recording medium |
| 04/14/1993 | EP0536112A1 Erasable optical wallet-size data card |
| 04/14/1993 | CN1071023A Apparatus for recording and playying |
| 04/13/1993 | US5202880 Thin film reflective layer which is covered by thin transparent dielectric layer covered by optically sensitive magnetic recording layer containing rare earth-transition metal alloys and thin transparent protective layer |
| 04/13/1993 | US5202878 Optical recording and reproducing method and apparatus for the same |
| 04/13/1993 | US5202874 Circuit arrangement for identifying the type of an optical record carrier |
| 04/13/1993 | US5202867 Condensing optical system with corrected chromatic aberration, and information recording/reproducing apparatus using this optical system |
| 04/13/1993 | US5202863 Magneto-optical disk unit compatible with different two types of magneto-optical disks and a magnetic-field generator suitable thereof |
| 04/13/1993 | US5202861 Magneto-optical disk drive having a mechanism for moving a bias magnetic field coil |
| 04/13/1993 | US5202860 Magneto-optic reproducing device using right and left circularly polarized light |
| 04/13/1993 | US5202789 Optical system for preserving a state of polarization of light beam |
| 04/13/1993 | US5202220 Depositing antistatic and scratch-resistance metal oxides conductive and photocurable resin layer on one surface of the substrate, forming recording layer on other surface |
| 04/13/1993 | CA1316258C Magneto-optical recording and reproducing device |
| 04/13/1993 | CA1315983C Magneto-optic memory device |
| 04/07/1993 | EP0535611A1 High resolution observation apparatus with photon scanning tunneling microscope |
| 04/07/1993 | EP0535577A2 A magneto-optical disc system and a magneto-optical disc |
| 04/06/1993 | US5200946 Simple magneto-optic rewritable head for roughedized environments |
| 04/06/1993 | US5200942 Focus adjusting apparatus for an optical pickup apparatus |
| 04/06/1993 | US5200936 Magneto-optic method and apparatus for recording and retrieving high-density digital data |
| 04/06/1993 | US5200935 Recording apparatus using magneto-optical effect including control means for inhibiting energizing of the light beam generating means in responsive to coded data |
| 04/06/1993 | US5200934 Method and apparatus for direct overwrite on magneto-optical recording media using circularly polarized microwaves |
| 04/06/1993 | CA1315880C Method for reproducing signal from magneto-optical recording medium |
| 04/04/1993 | CA2079752A1 High resolution observation apparatus with photon scanning microscope |
| 03/31/1993 | EP0534687A1 Optical Disc |
| 03/31/1993 | EP0534373A2 Optical pickup device |
| 03/30/1993 | US5199090 Flying magnetooptical read/write head employing an optical integrated circuit waveguide |
| 03/30/1993 | US5199024 Optical data storage medium having embedded tracking information |
| 03/30/1993 | US5199023 Optical information recording medium with a separating part between information tracks |
| 03/30/1993 | US5199022 Disk having data memorizing portion including land-shaped and groove-shaped areas, and writing/reading apparatus for the same |
| 03/30/1993 | US5199013 Optical head apparatus applicable to optical disc apparatus |
| 03/30/1993 | US5199010 Method for initializing a magneto-optical disk using a coil as a means to initialize the disk |
| 03/30/1993 | US5198916 Optical pickup |
| 03/30/1993 | US5198087 Method of making magneto-optical recording medium |
| 03/25/1993 | DE4231160A1 Magneto=optical information recording material - has glass substrate and recording film with reflective film structure having high reflectivity lasers alternating with low thermal conductivity layers |
| 03/23/1993 | US5197060 Dual substrate optical recording medium |
| 03/23/1993 | US5197050 Flying head for a magneto-optical recording drive |
| 03/23/1993 | US5197049 Head and media for optical data storage |
| 03/23/1993 | US5196701 High-resolution detection of material property variations |
| 03/23/1993 | CA1314984C Thermomagnetic recording method applying power modulated laser on a magnetically coupled multi-layer structure of perpendicular anisotropy magnetic film |
| 03/23/1993 | CA1314768C Magneto-optical recording medium |
| 03/17/1993 | EP0531808A1 Improvement in a magneto-optical recording medium |
| 03/17/1993 | EP0531354A1 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. |
| 03/17/1993 | CN1020137C System for recording information signal, and record carrier and recording device |
| 03/16/1993 | US5195082 Optical disk structures for electron trapping optical memory media |
| 03/16/1993 | US5195080 Optical recording medium initializing method and apparatus |
| 03/10/1993 | EP0530913A1 Magneto-optical recording medium |
| 03/10/1993 | EP0530728A2 Magneto-optical memory device for multi-wavelength recording and reproduction |
| 03/09/1993 | US5193085 Magneto-optical recording medium with exchange-coupled reproducing layer containing platinum |
| 03/09/1993 | US5193082 Optical/magnetic composite head having magnetic and optical heads in one integrated unit |
| 03/09/1993 | US5193080 Magneto-optical recording medium and apparatus |
| 03/04/1993 | WO1993004471A1 Optical scanning device |
| 03/04/1993 | DE4128245A1 Read-write system for data discs using fixed heads - assigns microelements to specific radial locations relating to tracks and integrated and non-rotating disc |
| 03/03/1993 | EP0530040A2 Optomagnetic disc apparatus with floating type magnetic head |
| 03/03/1993 | EP0529795A1 Magnetooptic recording medium |
| 03/03/1993 | EP0529662A2 Optical disc and method for recording on optical disk |
| 03/03/1993 | CN1020013C Circuit for reversing magnetic field |
| 03/02/1993 | US5191564 Over-write capable magnetooptical recording medium having groove depth of 800 Å or less |
| 03/02/1993 | US5191563 Method for increasing track density of magneto-optical storage media |
| 03/02/1993 | US5191562 Positioning system for the heads of a magneto-optical data recorder |
| 03/02/1993 | US5191561 Magnetooptical recording medium including five magnetic layers for direct overriding by light intensity modulation without an external bias field |
| 03/02/1993 | US5191204 Multi-beam optical system and method with power detection of overlapping beams |
| 02/25/1993 | DE4127840A1 Optische abtastvorrichtung Optical scanning device |
| 02/23/1993 | US5189655 Optical head for optical disk recording/reproducing apparatus including modified wollaston prism |
| 02/23/1993 | US5189651 Optical system in magneto-optical recording and reproducing device |
| 02/23/1993 | US5189650 Magneto-optical signal reproducing apparatus in which reproduced magneto-optical signal level is compared with reference signal level varied in accordance with in-phase signal |
| 02/23/1993 | US5189649 Method and apparatus for directly overwriting magnetooptic data storage media |
| 02/23/1993 | US5189578 Disk system with sub-actuators for fine head displacement |
| 02/23/1993 | US5189567 High speed switching circuit for controlling current flow in a bridge circuit coil for use in a magneto-optic direct overwrite system |
| 02/17/1993 | EP0527670A1 Magneto-optical read head |
| 02/17/1993 | EP0527602A2 Optical memory |