| 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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| 06/16/1987 | US4674078 Optical information reproducing apparatus with improved skew error control |
| 06/16/1987 | US4674076 Optical memory system having improved positioning and focusing control circuitry |
| 06/16/1987 | US4674072 Index pulse generator capable of producing an index pulse of stabilized nature for use in optical information recording and reproduction systems |
| 06/16/1987 | US4674071 Data recording area signal generating method and apparatus |
| 06/16/1987 | US4674070 Optical type disc with V-shaped groove and optical type reproducing apparatus therefor |
| 06/16/1987 | US4673626 Optical recording card with optical recording layers |
| 06/16/1987 | US4673602 Composite substrate plate for magnetic or optical disk and process for production thereof |
| 06/16/1987 | EP0225801A1 Optical devices |
| 06/16/1987 | EP0225647A2 High density recording medium |
| 06/16/1987 | EP0225564A2 Optical head |
| 06/11/1987 | DE3641587A1 Process and apparatus for a combined wobble-track servo arrangement |
| 06/11/1987 | DE3634865A1 Data carrier with an optical indication of authenticity and process for producing and testing the indication |
| 06/10/1987 | EP0225259A1 Pre-engraved information carrier and its optical scanning device with sampled access |
| 06/10/1987 | EP0225258A2 Focus servomechanism control system of optical disc system having offset setting means |
| 06/10/1987 | EP0224935A2 Amplitude detection circuit |
| 06/10/1987 | EP0224853A2 Optical head |
| 06/10/1987 | CN86106577A Recording reproducing information device |
| 06/10/1987 | CN86103142A Optical reader for printed bit-encoded data and method of reading same |
| 06/09/1987 | US4672600 Optical disc having protective cover |
| 06/09/1987 | US4672597 Clock signal reproducing circuit for a player reproducing information of a disc |
| 06/09/1987 | US4672596 Level controlled readout system for formatted record recorded on an optical disc |
| 06/09/1987 | US4672578 Method of information recording on a semiconductor wafer |
| 06/09/1987 | US4672395 Optical fungicide-treated information recording and reproducing medium |
| 06/09/1987 | US4672188 Focus detector for optical apparatus |
| 06/09/1987 | US4672187 Focusing error detecting device in head assembly for optical disc |
| 06/09/1987 | US4671623 Aspheric object lens for optical data read-out apparatus |
| 06/09/1987 | CA1222793A1 Calibrated feedback for laser diodes |
| 06/03/1987 | EP0224378A2 Means for parking read/write heads in a disc drive using the back-emf of the spindle motor to operate a stepper motor |
| 06/03/1987 | EP0224377A2 Speed detecting device |
| 06/03/1987 | EP0224313A2 Method for the optical recording of information and an optical recording element used in the method |
| 06/03/1987 | EP0224312A1 Matrix |
| 06/03/1987 | EP0224261A2 Optical recording medium |
| 06/03/1987 | EP0224258A2 Optical information storage medium |
| 06/03/1987 | EP0224251A2 Method and apparatus for correcting angular deviation of optical recording medium |
| 06/03/1987 | EP0224250A2 Optical recording medium and method and apparatus for correcting angular deviation thereof |
| 06/03/1987 | EP0224191A2 Method for forming optically smooth polymeric layers |
| 06/03/1987 | EP0223957A1 Optoelectronic scanning head |
| 06/03/1987 | EP0223804A1 Process for track jumping in track search processes and circuit arrangement for implementation of the process. |
| 06/02/1987 | US4670869 Switching laser beam apparatus with recombined beam for recording |
| 06/02/1987 | US4670804 Expandable suspension for a read/write head in a disk file |
| 06/02/1987 | US4670356 Multilayer-recording media containing rare earth and transition metals |
| 06/02/1987 | US4670345 Information recording medium |
| 06/02/1987 | US4670332 Three dimensional arrangement of corrosion resistance, high melting metals |
| 06/02/1987 | US4670077 Method of providing a substrate with an optically readable information disc |
| 06/02/1987 | US4669823 Optical system drive for optical recording/reproducing apparatus |
| 05/27/1987 | EP0223576A2 Light control circuit of an optical disc system |
| 05/27/1987 | EP0223361A1 Light receiving members |
| 05/27/1987 | EP0223353A2 Information record carrier |
| 05/27/1987 | EP0223191A2 Optical head Apparatus |
| 05/27/1987 | EP0223057A2 An optical recording method and an apparatus using the method |
| 05/27/1987 | CN86105946A Expandable suspension for supporting a slider and moving it to the disk in a data recording disk file |
| 05/27/1987 | CN86105258A Optical scanning unit |
| 05/27/1987 | CN86104848A Optical scanning device for electric magnetic suspension lens flat moving and angle position measuring system |
| 05/26/1987 | US4669077 Process and system for optical recording and reading on a mobile data carrier |
| 05/26/1987 | US4669075 Optical disk control apparatus |
| 05/26/1987 | US4669074 Focusing control circuitry for an optical memory system |
| 05/26/1987 | US4669073 Optical disk drive apparatus |
| 05/26/1987 | US4669072 Control apparatus for optical video disk recorder/player |
| 05/26/1987 | US4669071 Photo sensor device and optical pickup device |
| 05/26/1987 | US4669070 Signal format for optical tape record/playback system |
| 05/26/1987 | US4668573 Intermetallic changing crystal structure when irradiated |
| 05/26/1987 | US4668550 Optical disc |
| 05/26/1987 | US4668549 Optically readable information disc |
| 05/26/1987 | US4668056 Single lens having one aspherical surface |
| 05/26/1987 | US4668055 Lens for an optical recording/reproducing apparatus and optical recording/reproducing apparatus using same |
| 05/21/1987 | WO1987003131A1 Optical card reader |
| 05/21/1987 | WO1987003117A1 Updatable micrographic pocket data card |
| 05/21/1987 | WO1987003108A1 Photochromic material, photochromic element and method of recording and erasing data |
| 05/20/1987 | EP0222565A2 Apparatus for urging a rotatable member to a neutral circumferential position |
| 05/20/1987 | EP0222362A2 Linear motor |
| 05/20/1987 | EP0222238A2 Pick-up device |
| 05/20/1987 | CN86107205A Light recording method and the apparatus using that method |
| 05/19/1987 | US4667317 Method for the storage on and the reproduction from an optically readable record carrier |
| 05/19/1987 | US4667316 Information recording-reproducing apparatus |
| 05/19/1987 | US4667315 Tight beam position controlling apparatus |
| 05/19/1987 | US4667309 Erasure means |
| 05/19/1987 | US4667246 Image processing system |
| 05/19/1987 | US4666819 Optical information storage based on polymeric dyes |
| 05/13/1987 | EP0221782A2 Optical information recording and reproducing apparatus |
| 05/12/1987 | US4665513 Arrangement for error detection for disc-shaped information carriers |
| 05/12/1987 | US4665512 Optical head for erasing |
| 05/12/1987 | US4665442 Cross-talk eliminating device in information-carrying disc player |
| 05/12/1987 | US4665310 Apparatus for optically scanning an information plane wherein a diffraction grating splits the beam into two sub-beams |
| 05/12/1987 | US4665004 Method for dual image recording of medical data |
| 05/12/1987 | US4664476 Magnetic objective lens driving apparatus with pivot |
| 05/07/1987 | WO1987002818A1 Data recording/regenerating device |
| 05/07/1987 | DE3636959A1 Optical information recording material |
| 05/06/1987 | EP0220724A2 Optical disc player equipped with a cleaning device for cleaning the surface of the optical disc |
| 05/05/1987 | US4663752 Sector mark signal control circuit for disc apparatus |
| 05/05/1987 | US4663751 Optical information processor for compensating offset |
| 05/05/1987 | US4663750 Focus error detection device for an optical recording/playing back system |
| 05/05/1987 | US4663749 Apparatus for reproducing information from an optically readable record carrier |
| 05/05/1987 | US4663276 Glass based laser recording material with intermediate layer |
| 05/05/1987 | US4663270 Multistate optical switching and memory using an amphoteric organic charge transfer material |
| 05/05/1987 | US4663267 Process of producing information recording disc |
| 05/05/1987 | US4663008 Method of producing an optical information recording medium |
| 04/30/1987 | DE3634857A1 Identity card with visually visible indication of authenticity and process for production of the same |
| 04/29/1987 | EP0220061A2 Optical recording coating |
| 04/29/1987 | EP0220039A2 Focus control system for optical information recorder or player |
| 04/29/1987 | EP0219908A1 Apparatus for optically scanning an information plane |