| Patents for G11B 7 - Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation, reproducing using an optical beam at lower power; Record carriers therefor (102,715) |
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| 04/05/1994 | CA1328311C Protection circuit for optical disc players |
| 04/05/1994 | CA1328182C Optical scanning apparatus |
| 03/31/1994 | WO1994007331A1 Video multiplexing system |
| 03/31/1994 | WO1994007330A1 Data formats on optical video tape |
| 03/31/1994 | WO1994007240A1 Buffering method and system for resonant scanner |
| 03/31/1994 | DE4333018A1 Optical recording disc for super-resolution reproduction - with address pit recorded radially across groups of concentric recording tracks |
| 03/31/1994 | DE4333003A1 Erasable optical recording method - directing laser light spot onto recording film with intensity controlled by relative movement of recording medium |
| 03/31/1994 | DE4332417A1 Optical data reader using laser scanning beam - mixes reflected light beam with reference beam having relative phase or frequency shift |
| 03/30/1994 | EP0589670A1 Optical information recording/reproducing apparatus |
| 03/30/1994 | EP0589611A2 Recording/reproducing apparatus for disc-shaped recording medium, photodetector and optical head |
| 03/30/1994 | EP0589041A1 Hydrogenated thermoplastic norbornene polymer, production thereof, and optical element base, optical element and lens molded therefrom |
| 03/29/1994 | US5299183 Optical data record/reproduction apparatus with tubular coil body |
| 03/29/1994 | US5299059 Plural-beam optical head including a uniaxial crystal right triangular prism beam divider |
| 03/29/1994 | US5299054 Optical switch |
| 03/29/1994 | US5298730 Optical card apparatus in which retrial of locating operation of optical card is retried on another track at the time of loading the same |
| 03/29/1994 | US5298608 Metal chelate of a monoazo compound and optical recording medium using it |
| 03/29/1994 | US5298587 Protective film for articles and method |
| 03/29/1994 | US5298305 With recording layer consisting of silver, indium, tellurium, antimony and an additional metal; sensitivity, erasibility |
| 03/29/1994 | CA1328135C Optical card recording and reproducing device |
| 03/29/1994 | CA1328134C Method for detecting tracking error in optical disk system and its optical system devices therefor |
| 03/29/1994 | CA1328133C Analog signal switching device for use in an optical memory device |
| 03/24/1994 | DE4331732A1 Access speed control circuit for optical disc systems - adds output of square wave oscillator to speed difference signal to control speed of head carriage moving coil motor. |
| 03/23/1994 | EP0588575A2 Optical recording/reproducing apparatus |
| 03/23/1994 | EP0588385A2 Recording/reproducing apparatus of optical card |
| 03/23/1994 | EP0588344A2 Device for writing to and reading from optical storage media |
| 03/23/1994 | EP0588305A2 Optical information recording medium and optical information recording/reproducing apparatus |
| 03/23/1994 | EP0587669A1 Optical memories incorporating diffraction gratings |
| 03/23/1994 | EP0587615A1 Signalization of types of defects of an optical information carrier. |
| 03/23/1994 | EP0447466B1 Optical recording and/or reproducing apparatus |
| 03/23/1994 | EP0294490B1 Optical disc discriminating device |
| 03/23/1994 | CN1084307A Light picking apparatus |
| 03/22/1994 | US5297132 Draw type optical recording medium |
| 03/22/1994 | US5297131 Eccentricity detection and compensation of a disk by a preformatted encoding pattern |
| 03/22/1994 | US5297129 Waveform shaping method and apparatus for optical recording |
| 03/22/1994 | US5297128 Optical information recording/reproducing apparatus including means for varying intensity of a preheating light beam |
| 03/22/1994 | US5297127 Optical device |
| 03/22/1994 | US5297125 Optical recording medium and information recording apparatus for recording bursts of low-pass filtered reproduce-only information in a wobbling pre-groove on the optical recording medium |
| 03/22/1994 | US5297122 Dust protection assembly for magneto-optic drive apparatus |
| 03/22/1994 | US5297114 Magneto-optic recording/reproduction apparatus for minimizing variation in focusing error signals caused by variation in optical source wavelength |
| 03/22/1994 | US5297113 Jump operation in two-head-type video disc player |
| 03/22/1994 | US5296995 Method of magnetically recording and reading data, magnetic recording medium, its production method and magnetic recording apparatus |
| 03/22/1994 | US5296988 Optical head with an adjusting mechanism for adjusting the position of an optical mirror |
| 03/22/1994 | US5296831 Coil arrangement for a focusing or track control circuit |
| 03/22/1994 | US5296694 Optical pick-up head apparatus with optical means having polarization anisotropy |
| 03/22/1994 | US5296528 Acrylic ester polymers |
| 03/22/1994 | US5296263 Chemical adsorption film on surface |
| 03/22/1994 | US5296162 Liquid crystal element containing phthalocyanine derivative |
| 03/22/1994 | CA1328016C Reproducing apparatus for an optical recording medium |
| 03/17/1994 | WO1994006117A1 Reproduction technique for sounds, pictures or both |
| 03/17/1994 | WO1994006113A1 Optical information recording medium and method of reading the same information |
| 03/17/1994 | WO1994006097A1 Diffraction surface data detector |
| 03/17/1994 | WO1994006039A1 Polarizing filter and method for the manufacture thereof |
| 03/17/1994 | DE4330794A1 Optical head unit for read write disc systems - directs optical beam through lens and prism arrangement to be reflected off disc and to be received by photodetectors coupled to processor. |
| 03/17/1994 | CA2143952A1 Diffraction surface data detector |
| 03/16/1994 | WO1994007329A1 Bidirectional sinusoidal scanning system |
| 03/16/1994 | EP0587425A2 Optical recording medium |
| 03/16/1994 | EP0587416A2 Image reproducing display apparatus and recording medium therefor |
| 03/16/1994 | EP0587373A1 Recording media, recording methods, recording/reproducing apparatus, and recording media cutting apparatus |
| 03/16/1994 | EP0587350A2 Optical disc apparatus and miserasing preventing circuit and method |
| 03/16/1994 | EP0587297A2 Image-information optical system, apparatus and method |
| 03/16/1994 | EP0587111A1 Optical information recording/reproducing apparatus |
| 03/16/1994 | EP0587019A2 Optical disk system and information processing system using the same |
| 03/16/1994 | EP0586990A2 Ultraviolet-curing resin for protecting coat of optical disk |
| 03/16/1994 | CN1024053C Method of and device for providing a record carrier with information patterns |
| 03/15/1994 | US5295131 Optical information recording disk having embossed clock mark pits and embossed information recording pits |
| 03/15/1994 | US5295130 Apparatus and method for signal reproduction |
| 03/15/1994 | US5295129 Light signal detecting circuit |
| 03/15/1994 | US5295127 Optical data recorder with segment synchronization marks |
| 03/15/1994 | US5295126 Information recording apparatus for recordable optical disc |
| 03/15/1994 | US5295125 Optical head device for recording/reproduction for recording medium using plural light spots |
| 03/15/1994 | US5295124 Optical recording apparatus |
| 03/15/1994 | US5294523 Optical information recording medium |
| 03/15/1994 | US5294518 Amorphous write-read optical storage memory |
| 03/15/1994 | US5294471 Optical information recording medium using metallized formazan dyes |
| 03/15/1994 | CA1327849C Optical data card |
| 03/09/1994 | EP0586189A2 Data recording apparatus and methods |
| 03/09/1994 | EP0586185A1 Optical information record/reproducing apparatus |
| 03/09/1994 | EP0586084A2 Reproducing apparatus |
| 03/09/1994 | EP0585710A2 Multilayered polyester base film for optical tape |
| 03/09/1994 | EP0321314B1 Optical disc |
| 03/09/1994 | CN1083616A Method and circuit for braking and driving of disc system in early stage |
| 03/09/1994 | CN1083615A Information storage system |
| 03/09/1994 | CA2105542A1 Image reproducing display apparatus and recording medium therefor |
| 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 | US5293568 Track-address judging method |
| 03/08/1994 | US5293567 Optical recording method |
| 03/08/1994 | US5293566 Information recording and reproducing apparatus |
| 03/08/1994 | US5293565 Fortmat for data-storing disk media wherein addressable track angular length is independent of disk revolutions |
| 03/08/1994 | US5293373 Optical disk and method of manufacturing the same |
| 03/08/1994 | US5293372 Apparatus for optically recording and reproducing information from an optical recording medium |
| 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 | US5293370 Method and apparatus for creating optical disc masters |
| 03/08/1994 | US5293368 Apparatus from reproducing address data on a disk |
| 03/08/1994 | US5293367 Optical pickup head wherein an error signal is produced by detecting a phase difference in diffraction beams from a holographic optical element |
| 03/08/1994 | US5293366 Information recording and reproducing apparatus provided with means for adding to a tracking signal offset corresponding to the positional deviation of a recording spot and a reproducing spot |
| 03/08/1994 | US5293365 Track control circuit for optical card recording/reproducing apparatus |
| 03/08/1994 | US5293364 Track access control device for an optical disk drive |
| 03/08/1994 | US5293363 Optical head apparatus with light weight movable lens holder |
| 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 | US5293291 Optical integrated device for magneto-optical reproducing head |