| 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) |
|---|
| 10/12/1993 | US5253242 Double-sided optical disc player |
| 10/12/1993 | US5253241 Optical recording apparatus for recording auxillary signals used for focus control |
| 10/12/1993 | US5253240 Tracking error detecting system for removing an offset in an optical disk player |
| 10/12/1993 | US5253239 Control apparatus for tracking a light beam on a track of an optical recording medium |
| 10/12/1993 | US5253238 Arrangement for producing precise tracking error signal for optical disk device |
| 10/12/1993 | US5253237 Optical head device |
| 10/12/1993 | US5253236 Optical beam focusing and tracking system for an optical disk information storage device |
| 10/12/1993 | US5252757 Dicyanoazulenyl and dicyanovinyl substituted furan |
| 10/12/1993 | US5252372 With recording layer having controlled content of gold and sulfur, high sensitivity and reflection, for low speed recording |
| 10/12/1993 | US5252371 Having recording layer containing tetracyano-derivatives of dibenzothienylethene capable of reversible cyclization on exposure to controlled wavelength light |
| 10/12/1993 | US5252370 Having recording thin film containing silver oxide or iron nitride which decompose on heating, for radiation resistance, storage stability, accuracy |
| 10/12/1993 | CA2040787C Optical pickup device |
| 10/12/1993 | CA1323101C Apparatus for regenerating information from records made by optical-wavelength-multiplexing method |
| 10/10/1993 | CA2093695A1 Twisted nematic film, a method for the preparation thereof, and a display device comprising said film |
| 10/07/1993 | DE4310917A1 Optical recording medium for laser disc player with dyestuff film - comprises phthalocyanine or naphthalocyanine dyestuff recording film and reflecting film on transparent substrate for semiconductor laser recording and low flicker |
| 10/07/1993 | DE4305487A1 Spring-type holding frame for disc-shaped workpieces - which minimises covered areas on workpiece surface |
| 10/07/1993 | DE4211285A1 Automatically correcting head position w.r.t. disc - coupling regulating device to processor using corrections based upon data characteristic and values in memory |
| 10/07/1993 | DE4211282A1 Correcting tangential errors of optical head of disc system - determining static tangential errors and storing correction values in memory accessed for each radial position |
| 10/07/1993 | DE4211213A1 Regulating optical disk scanning during start=up phase of drive - using radial and tangential servo regulators responding to eliminate error between angles of optical scanner and that of disc |
| 10/06/1993 | EP0564282A2 Bis-dithiobenzilnickel complexes for usae in near-infrared absorbing materials and benzoin derivatives as intermediates therefor |
| 10/06/1993 | EP0564260A2 Optical recording medium and optical recording/reproducing apparatus |
| 10/06/1993 | EP0564203A1 Optical information recording/reproducing method and apparatus using card-like optical information recording medium |
| 10/06/1993 | EP0564187A2 Recording and reproducing apparatus |
| 10/06/1993 | EP0563970A1 Driving device for objective lens |
| 10/06/1993 | EP0563922A2 Data processing circuit for disc player |
| 10/06/1993 | EP0563779A2 Laser light beam generating apparatus |
| 10/06/1993 | EP0563484A1 Optical pick-up head apparatus |
| 10/06/1993 | CN1077046A Optical device and apparatus for scanning an information plane, comprising such an optical device |
| 10/05/1993 | US5251202 Optical information recording medium having multi-layered structures for preventing undesired reflection and electric charging |
| 10/05/1993 | US5251201 Capable of accessing data recorded on both sides of an optical disk |
| 10/05/1993 | US5251199 Laser diode drive control apparatus |
| 10/05/1993 | US5251198 Reading device for multi-layered optical information carrier |
| 10/05/1993 | US5251197 Polarization dependent writing and erasing process for organic optical media |
| 10/05/1993 | US5251194 Techniques for controlling beam position and focus in optical disk drives |
| 10/05/1993 | US5251193 Solid state optical disk reader |
| 10/05/1993 | US5251060 Light-source unit |
| 10/05/1993 | US5250796 Noise reduction system for optical record and reproduction apparatus using auto-power controlled semiconductor laser device |
| 10/05/1993 | US5250787 Optical-disk playback apparatus, method of optical-disk playback and combined memory medium, having control programs stored in the optical-disc and specified by barcodes stored in a barcode memory medium |
| 10/05/1993 | US5250723 High surface hardness transparent resin and polymerizable monomer |
| 10/05/1993 | CA1322809C Polycarbonates containing aralkylphenyl end groups, their preparation and their use |
| 10/05/1993 | CA1322791C Method of optically scanning an information plane and optical record carriers and scanning apparatuses suitable for use of said method |
| 10/05/1993 | CA1322789C Single stage seek method |
| 09/30/1993 | DE4307733A1 Printing machine with interchangeable printing heads - enables second head to be prepared for printing whilst first head is in use |
| 09/29/1993 | EP0562841A1 Image development apparatus and method |
| 09/29/1993 | EP0562823A1 Motion picture films and recording and playback apparatus therefor |
| 09/29/1993 | EP0562646A2 Electro-magnetic actuator and optical disk |
| 09/29/1993 | EP0562595A2 Apparatus for positioning optical head on a track of rotating disk |
| 09/29/1993 | EP0562488A1 Superresolution scanning optical device |
| 09/29/1993 | EP0562158A1 Tracking error detecting system |
| 09/29/1993 | CN1076806A Detachable storage assembly |
| 09/28/1993 | US5249213 Circuit for counting the number of crossed over tracks by an optical head in optical disk apparatus |
| 09/28/1993 | US5249176 Optical recording medium, process for preparing the same and its optical recording and reproducing system |
| 09/28/1993 | US5249175 Optical information recording medium and information recording and reproducing method therefor |
| 09/28/1993 | US5249173 Galvanomirror unit |
| 09/28/1993 | US5249172 Write laser power setting responsive to a series of written test signals having two frequency components |
| 09/28/1993 | US5249171 Opto-magnetic pick-up device including phase difference correcting means |
| 09/28/1993 | US5249170 Memory disk and apparatus for recording information on memory disk |
| 09/28/1993 | US5249168 Method and apparatus for initializing optical disk drive apparatus |
| 09/28/1993 | US5249167 Optical pickup apparatus which includes a plate-like element for splitting a returning light beam into different light beams having different focussing point |
| 09/28/1993 | US5249116 Digital control system and a sub-circuit to be used in the control system |
| 09/28/1993 | US5248992 High numerical aperture image forming apparatus using optical fibers for both writing and focus control |
| 09/28/1993 | US5248990 Process for producing optical recording medium for optical data recording and reproduction |
| 09/28/1993 | US5248584 Optical card and method for reading information recorded in it |
| 09/28/1993 | US5248538 Sulfonamido or amido substituted phthalocyanines for optical recording |
| 09/28/1993 | CA1322598C Tilt servo device in optical disc player |
| 09/23/1993 | DE4307410A1 Optical detector for recording and=or reproducing information - contains adjustable wavelength laser source, prism with refractive index varying with wavelength, track deviation detector, and source wavelength controller |
| 09/23/1993 | DE4208328A1 Erasable optical disc memory system - has photo-refractive memory layer sandwiched between transparent layers and with information storage provided by creation of holographic patterns |
| 09/22/1993 | EP0561685A2 An electronic data protection system |
| 09/22/1993 | EP0561648A1 Waveform shaping circuit suitably arranged for optically recording and reproducing apparatus |
| 09/22/1993 | EP0561630A2 Polycarbonate resin compositions for optical use |
| 09/22/1993 | EP0561454A2 Method and apparatus for editing an audio signal |
| 09/22/1993 | EP0561420A1 Biaxial actuator |
| 09/22/1993 | EP0561393A1 Method and apparatus for automatically exchanging a stamper unit with another one |
| 09/22/1993 | EP0561080A1 Photoresist for optical disc and method of preparing optical disc utilizing photoresist |
| 09/22/1993 | EP0561079A1 Photoresist for optical disc and method of preparing optical disc utilizing photoresist |
| 09/21/1993 | US5247646 Compressed data optical disk storage system |
| 09/21/1993 | US5247510 Increasing storage density of optical data media by detecting a selected portion of a light spot image corresponding to a single domain |
| 09/21/1993 | US5247509 Disk storage which automatically adjusts to optimum recording/reproducing level |
| 09/21/1993 | US5247508 Laser adjusting apparatus tracking control for use with an optical disc |
| 09/21/1993 | US5247507 Optical scanning system for a sinusoidal data track |
| 09/21/1993 | US5247506 Optical pickup for reproducing information from an optical information storage medium |
| 09/21/1993 | US5247505 Information recording method for reciprocally recording and verifying information |
| 09/21/1993 | US5247504 Information recording/reproducing apparatus |
| 09/21/1993 | US5247503 Optical recording and reproducing apparatus with separated high and low frequency servo signals |
| 09/21/1993 | US5247502 Optical information recording and/or reproducing apparatus and method for sampling an irradiation state error signal |
| 09/21/1993 | US5247501 Tracking error detection apparatus for an optical disk |
| 09/21/1993 | US5247499 Optical card apparatus for re-seeking by moving an optical head in a tracking direction |
| 09/21/1993 | US5247498 Optical disk drive apparatus and a seek method spiral track |
| 09/21/1993 | US5247495 Optical magnetic disk with separate regions provided on it |
| 09/21/1993 | US5247494 Method for recording and reproducing information on and from an optical disk having a read-only recorded zone and a writable and readable zone using a spot laser light |
| 09/21/1993 | US5247493 Magneto-optical recording and reproducing disk device having a bimorph type actuator with specific structures for mounting a magnetic head in opposing to the surface of the disk |
| 09/21/1993 | US5247167 Multiple beam power monitoring system and method with radiation detection and focusing means of overlapping beams |
| 09/21/1993 | US5247126 Image reproducing apparatus, image information recording medium, and musical accompaniment playing apparatus |
| 09/21/1993 | US5247098 Thiophene derivative having long conjugated chain at 3-position, and photo-responsive material imploying the same |
| 09/21/1993 | US5246814 Process for recording on optical recording medium |
| 09/21/1993 | US5246766 Lead-tin alloy layer |
| 09/21/1993 | US5246758 Optical recording medium |
| 09/21/1993 | US5246747 Self-assembled optical media |
| 09/21/1993 | US5246531 Method of fabricating glass substrate for disk |
| 09/21/1993 | US5246179 Optical fiber take-up assembly |