| 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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| 06/20/1989 | US4840457 Angled strut diaphragm spring |
| 06/20/1989 | CA1256205A1 Portable laser diode scanning head |
| 06/15/1989 | WO1989005509A1 Disk recording apparatus |
| 06/15/1989 | WO1989005507A1 A method of producing a surface microstructure on glass |
| 06/15/1989 | WO1989005330A1 Aromatic polymer moldings having modified surface condition and process for their production |
| 06/14/1989 | EP0320291A2 Information recording medium and method of recording or reproducing optical information employing the same |
| 06/14/1989 | EP0320276A2 Optical pickup device |
| 06/14/1989 | EP0320237A2 Active energy ray-curable composition and optical recording medium having cured product of the composition |
| 06/14/1989 | EP0320011A2 Image display apparatus |
| 06/14/1989 | EP0319800A2 Optical media having interlaced data rings |
| 06/14/1989 | EP0319728A1 Naphthalactam trimethine dyestuffs and optical recording medium containing these dyestuffs |
| 06/14/1989 | EP0319636A1 Magneto-optic memory device |
| 06/14/1989 | CN1004526B Storing device for phase changeable material |
| 06/13/1989 | US4839883 Optical information recording medium |
| 06/13/1989 | US4839882 Record carrier with an optically readable trackwise-arranged information structure |
| 06/13/1989 | US4839881 Pickup transport device for optical disc apparatus |
| 06/13/1989 | US4839879 Method for recording data on non-defective sectors of an optical disk |
| 06/13/1989 | US4839878 Apparatus for controlling the writing of data in disk sectors |
| 06/13/1989 | US4839876 Track seeking using a track following loop |
| 06/13/1989 | US4839861 Information recording medium rewritable by utilizing two metastable phases of a recording layer and method using the same |
| 06/13/1989 | US4839251 Photo-mask for use in manufacturing an optical memory disc, a method for making the photo-mask and a method for manufacturing the optical memory disc |
| 06/13/1989 | US4839208 Recording layer contains selenium, tellurium, and nitrogen |
| 06/13/1989 | US4839207 Recording layer contains selenium, tellurium, and fluorine |
| 06/13/1989 | US4838649 Apparatus for driving objective lens |
| 06/13/1989 | US4838648 Thin film structure having magnetic and color shifting properties |
| 06/13/1989 | CA1255791A1 System and method for recording digital information |
| 06/13/1989 | CA1255656A1 Recording information media comprising chromophores |
| 06/13/1989 | CA1255655A1 Media for optical information storage comprising an organic macrocyclic chromophore substituted with a film conferring organic substitutent |
| 06/13/1989 | CA1255527A1 Single lens having one aspherical surface |
| 06/08/1989 | DE3826902A1 Process for recording and reproducing information onto and from an optical disc of the phase-changing type |
| 06/07/1989 | EP0319350A2 Method of and photomask for manufacturing optical memory element |
| 06/07/1989 | EP0319343A2 Information recording medium |
| 06/07/1989 | EP0319301A2 Information recording discs |
| 06/07/1989 | EP0319245A2 Optical information recording apparatus |
| 06/07/1989 | EP0319106A1 Method of and device for recording information, record carrier. |
| 06/07/1989 | EP0319102A1 Method of and device for recording information on a record carrier, and device for reading the recorded information |
| 06/07/1989 | EP0319037A2 Optical information recording medium |
| 06/07/1989 | EP0319033A2 Method for detecting focus error using light beams having astigmatism and optical information processing system using this method. |
| 06/07/1989 | EP0318912A2 An optical head |
| 06/07/1989 | EP0318897A2 An apparatus for focusing a light beam onto an information memory medium |
| 06/07/1989 | EP0318739A2 Apparatus for tracking an optical disc |
| 06/07/1989 | EP0318593A1 Device for reading optical recording medium and optical detector therefor |
| 06/07/1989 | EP0318568A1 Installation for reproducing data from an optical disc |
| 06/07/1989 | EP0318566A1 Optical scanning head. |
| 06/07/1989 | EP0318558A1 Optical data storage |
| 06/06/1989 | US4837759 Optical information recorder |
| 06/06/1989 | US4837757 Optical recording/reproducing device |
| 06/06/1989 | US4837745 Process for the reversible optical storage of data |
| 06/06/1989 | US4837429 Photodetector for use with an optical recording medium |
| 06/06/1989 | US4837134 Optical memory card with versatile storage medium |
| 06/06/1989 | US4837130 Optical disk manufacturing method |
| 06/06/1989 | US4837127 Recording medium |
| 06/06/1989 | US4837063 Optical recording material |
| 06/06/1989 | US4836890 Method for producing optical information recording disk |
| 06/06/1989 | US4836874 Method of mass producing damage-resistant compact discs |
| 06/06/1989 | CA1255386A1 Power control system for a semiconductor laser |
| 06/06/1989 | CA1255385A1 Track servo system for controllably projecting an optical beam to an optical disk |
| 06/06/1989 | CA1255138A1 Adjustable mount for a pivoting mirror and an optical recording-reading head using such a mount |
| 06/06/1989 | CA1255134A1 Obturator disc for an optical transducer |
| 05/31/1989 | EP0318443A2 Track seeking using a track following loop |
| 05/31/1989 | EP0318337A2 Magneto-optic memory medium |
| 05/31/1989 | EP0318200A2 Optical information recording and erasing method |
| 05/31/1989 | EP0318095A1 Apparatus for optically scanning an object |
| 05/31/1989 | EP0317696A1 Optical information recording medium |
| 05/31/1989 | EP0214256B1 System to ascertain the scanning speed of audio discs with contactless scanning |
| 05/30/1989 | USRE32937 Modulation system for optical recording |
| 05/30/1989 | US4835762 Optical memory device and system |
| 05/30/1989 | US4835761 Signal to noise ratio of optical head apparatus employing semiconductor laser beam source |
| 05/30/1989 | US4835759 Method and apparatus for compensating variation of read data in an optical data storage |
| 05/30/1989 | US4835758 Dropout detection device for an optical type disc playback device |
| 05/30/1989 | US4835756 Optical memory apparatus using an optical disc having guide-grooves of V-shape and predetermined optical depth and access method therefor |
| 05/30/1989 | US4835755 Recording disk reproducing apparatus having high-resolution A/D converter |
| 05/30/1989 | US4835754 Tracking control device of an optical pick-up |
| 05/30/1989 | US4835753 Information playback system having an address search operation using a variable speed pickup positioning system |
| 05/30/1989 | US4835752 Device for driving and controlling optical head for use in optical disk system |
| 05/30/1989 | US4835751 Reading system for use with optical disc memory system utilizing a smectic chiral liquid crystal |
| 05/30/1989 | US4835380 Scanning device for an optical recording and/or reproducing apparatus |
| 05/30/1989 | US4835378 Apparatus for optically scanning a radiation-reflective information plane |
| 05/30/1989 | US4835376 Laser read/write system for personal information card |
| 05/30/1989 | US4835048 Optical information recording card using phase separation of polymer blend |
| 05/30/1989 | US4835027 Optical disc |
| 05/30/1989 | US4834843 Transfer molding |
| 05/30/1989 | US4834819 Process for producing information recording discs |
| 05/30/1989 | US4834477 Method of controlling the temperature of semiconductor laser in an optical device |
| 05/30/1989 | CA1254998A1 Information signal recording medium and reproducing apparatus therefor |
| 05/24/1989 | EP0317536A2 Employing the principles of separability for detecting light beams |
| 05/24/1989 | EP0317368A2 Process for preparation of optical recording medium |
| 05/24/1989 | EP0317344A2 An optical memory medium |
| 05/24/1989 | EP0317338A2 System and method for accessing tracks for optical disc apparatus |
| 05/24/1989 | EP0317224A2 Focus detection system for an optical disk drive using photo sensor elements in the far field of information pits |
| 05/24/1989 | EP0317193A2 Optical disc recording system |
| 05/24/1989 | EP0316959A2 Optical information reproducing apparatus |
| 05/24/1989 | EP0316866A2 Apparatus for detecting a focusing state of optical system |
| 05/24/1989 | EP0316846A2 Optical apparatus |
| 05/24/1989 | EP0316508A1 Magneto-optic memory device |
| 05/24/1989 | EP0316394A1 Optical data storage method and materials therefor |
| 05/24/1989 | EP0316341A1 Method and apparatus for reading data with ccd area arrays |
| 05/24/1989 | EP0213148B1 Polymeric cyanine dyes and their use in optical recording |
| 05/23/1989 | US4833664 Servo system for scanning the same track circumference of a spiral track on a disc shaped recording medium |
| 05/23/1989 | US4833561 Pickup apparatus for magneto-optical recording medium |