| 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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| 08/15/1989 | US4856871 Replaceable laser and lens assembly |
| 08/15/1989 | CA1258447A2 Camera |
| 08/10/1989 | WO1989007312A1 Recording method and apparatus |
| 08/10/1989 | WO1989007311A1 Optical media reflective materials |
| 08/10/1989 | WO1989007310A1 Optical data storage media with spatially variable energy absorptivity |
| 08/10/1989 | WO1989007104A1 Novel spirooxazine compounds |
| 08/09/1989 | EP0327172A1 Optical record carrier |
| 08/09/1989 | EP0327126A2 Spacer holder arrangement |
| 08/09/1989 | EP0327090A2 Optical recording/reproducing apparatus |
| 08/09/1989 | EP0327033A2 Information processing apparatus |
| 08/09/1989 | EP0326935A2 Process for producing on a surface a thin, X-rays-amorphous layer od aluminium nitride or of aluminium-silicon nitride |
| 08/09/1989 | EP0326576A1 Optical recording method for data cards |
| 08/09/1989 | CN1034628A Information recording discs |
| 08/08/1989 | US4856108 Optical arrangement and a reading apparatus including detection of data elements diffractive along entire extent |
| 08/08/1989 | US4856011 Semiconductor laser control circuit |
| 08/08/1989 | US4855992 Reversible optical recording medium with an optothermally deformable recording layer |
| 08/08/1989 | US4855991 Optical disk having track offset detection areas |
| 08/08/1989 | US4855988 Optical information recording and reproducing apparatus with amplitude limitation of a detected signal in a write operation mode |
| 08/08/1989 | US4855987 Optical device comprising a holder accommodating an optical system which compensates for thermal expansion/contraction |
| 08/08/1989 | US4855986 Data storage and readout optical head using a single substrate having an electrooptic converging portion for adjustment of the light beam focal point |
| 08/08/1989 | US4855985 Digital storage |
| 08/08/1989 | US4855984 Method of making and pretesting a digital recording medium |
| 08/08/1989 | US4855983 Apparatus for recording and reading an optical disk, having reduced offset in its tracking error signal |
| 08/08/1989 | US4855982 Lens position-sensing apparatus for optical recording system |
| 08/08/1989 | US4855981 Method and device for reading out optically recorded data and compensating for a drastic change in the position of a line to be read |
| 08/08/1989 | US4855978 Video/compact disk player having reduced track search time |
| 08/08/1989 | US4855977 Track seeking apparatus and method using sampled information |
| 08/08/1989 | US4855976 Information writing method for an optical disc memory system utilizing a smectic chiral liquid crystal |
| 08/08/1989 | US4855951 Method for erasing recording in a PHB memory |
| 08/08/1989 | US4855950 Optical storage apparatus including a reversible, doping modulated, multilayer, amorphous element |
| 08/08/1989 | US4854696 Method and apparatus for placing indicia on cinematic film |
| 08/08/1989 | CA1258172A1 Erasable optical recording method |
| 08/02/1989 | EP0326437A2 Optical disk recording and reproducing device |
| 08/02/1989 | EP0326374A2 A moving coil linear motor |
| 08/02/1989 | EP0326354A2 Apparatus for reading information out of an optical recording medium |
| 08/02/1989 | EP0326343A2 Optical information recording apparatus |
| 08/02/1989 | EP0326342A2 Information recording medium, production process and molding die for substrate therefor |
| 08/02/1989 | EP0326246A2 Objective lens driving apparatus |
| 08/02/1989 | EP0326215A1 Optically readable record carrier of the inscribable type and optical read apparatus for reading such a record carrier |
| 08/02/1989 | EP0326206A1 Method of and apparatus for recording an information signal |
| 08/02/1989 | EP0326203A1 Apparatus for optically scanning an information plane |
| 08/02/1989 | EP0325990A1 Multilayer recording medium for optical information |
| 08/02/1989 | EP0325838A2 Optical data storage drum, drive, and method |
| 08/02/1989 | EP0325823A1 Data storage system |
| 08/02/1989 | EP0325772A2 Method of recording and reproducing audio information in relation to graphics information |
| 08/02/1989 | EP0325742A2 Phthalocyanine compound and optical recording material using it |
| 08/02/1989 | EP0207156B1 Side lobe suppression in holograms |
| 08/02/1989 | CN1034445A Method of and apparatus for suecessively recording efm-modulated signals |
| 08/01/1989 | US4853934 Semiconductor laser control apparatus |
| 08/01/1989 | US4853923 Maneto-optical recording apparatus with path length compensated dual photo-electric conversion |
| 08/01/1989 | US4853922 Method of cleaning the surface of an optical disc and a cleaning device |
| 08/01/1989 | US4853921 Method for storing data in rotary type recording media |
| 08/01/1989 | US4853920 Information recording medium and reproducing method therefor |
| 08/01/1989 | US4853919 Information processing apparatus in which a deflected light and O-order light are respectively used for information recording/reproduction and tracking, and a method therefor |
| 08/01/1989 | US4853918 Tracking servo uses tangent function to determine tracking error signal |
| 08/01/1989 | US4853917 Optical tracking apparatus with photodetector disposed outside part of the effective diameter of the lens system |
| 08/01/1989 | US4853915 Optical recording/reproducing method and apparatus for optical disk medium having unique control parameters |
| 08/01/1989 | US4853913 Pick-up control circuits for disc information reproducing apparatus |
| 08/01/1989 | US4853911 Optical disc memory system utilizing a smectic chiral liquid crystal |
| 08/01/1989 | US4853260 Optical disk and process for producing the same |
| 08/01/1989 | EP0379757A1 Optical pickup drive device |
| 08/01/1989 | CA1258123A1 Read/write head for optical disks |
| 08/01/1989 | CA1257966A1 Dye mixtures and optical recording elements containing same |
| 07/27/1989 | DE3800732A1 Process for cutting glass blanks out of glass sheets, and apparatus for carrying out the process |
| 07/26/1989 | EP0325570A1 Poly(hydroxyether-diphenyldimethylsiloxane) copolymers and uses thereof |
| 07/26/1989 | EP0325491A1 Automatic gain control device for use in an optical memory device |
| 07/26/1989 | EP0325488A1 Analog signal switching device for use in an optical memory device |
| 07/26/1989 | EP0325434A2 Track access control system |
| 07/26/1989 | EP0325399A2 Information recording media |
| 07/26/1989 | EP0325330A1 Optically readable record carrier of the inscribable type, apparatus for manufacturing such a record carrier, and apparatuses for recording and/or reading information on/from such a record carrier |
| 07/26/1989 | EP0325329A1 Method of and apparatus for successively recording EFM-modulated signals |
| 07/26/1989 | EP0325104A2 Magneto-optical head with separate optical paths for error and data detection |
| 07/26/1989 | EP0325103A2 Method for constructing an optical head by varying a hologram pattern |
| 07/26/1989 | EP0324949A1 Tracking system for optical disc memory |
| 07/26/1989 | EP0324859A1 Error signal generator circuit |
| 07/26/1989 | EP0324831A1 Erasable optical wallet-size data card |
| 07/26/1989 | EP0324823A1 Reversible infra-red recording medium |
| 07/25/1989 | US4852105 System for evaluation of a subcode |
| 07/25/1989 | US4852101 Apparatus for recording and/or reproducing optical cards |
| 07/25/1989 | US4852077 Optical data storage media with spatially variable energy absorptivity |
| 07/25/1989 | US4852076 Optical information recording and reproducing disc employing a film having thermally changeable optical characteristics |
| 07/25/1989 | US4852075 Erasable optical data storage medium and method and apparatus for recording data on the medium |
| 07/25/1989 | US4852074 Method of measurement of crosstalk noise in playback information signal |
| 07/25/1989 | US4851549 Pigments |
| 07/25/1989 | US4851323 Optical information recording card using polymer blend as recording material |
| 07/25/1989 | US4850791 Flow processing system |
| 07/25/1989 | US4850695 Test system for optical disks |
| 07/25/1989 | US4850673 Optical scanning apparatus which detects scanning spot focus error |
| 07/20/1989 | DE3800567A1 Compression mould for pressing hard glass diskettes |
| 07/20/1989 | DE3800428A1 Optical scanning head |
| 07/19/1989 | EP0324621A2 Manufacturing optical cards |
| 07/19/1989 | EP0324518A1 Optical scanning apparatus |
| 07/19/1989 | EP0324214A1 Method and device for producing full tone images from a video input |
| 07/19/1989 | CN2041446U Sensor feed apparatus for reproducer of disc recording carrier |
| 07/18/1989 | US4849956 Information recording and reproducing apparatus |
| 07/18/1989 | US4849955 Moving device for an optical recording system in a high density spiral track-forming apparatus |
| 07/18/1989 | US4849954 Disc attitude variation detecting apparatus |
| 07/18/1989 | US4849953 Tracking circuit for an optical information recording and reproducing apparatus |
| 07/18/1989 | US4849825 Pick-up device for use in an optical information recording system |
| 07/18/1989 | US4849304 Optical recording medium |