| 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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| 01/09/1991 | EP0406823A2 Magnetooptical recording media |
| 01/09/1991 | EP0406569A2 Optical recording medium |
| 01/09/1991 | EP0406378A1 Erasable phase change optical recording elements and methods |
| 01/08/1991 | US4984232 Writing or rewriting |
| 01/08/1991 | US4984231 Optical information phase change recording medium having double protective layer |
| 01/08/1991 | US4984229 Autofocus system |
| 01/08/1991 | US4984227 Recording data |
| 01/08/1991 | US4984198 Liquid crystal electrooptic memory device |
| 01/08/1991 | US4983819 Optical card |
| 01/08/1991 | US4983815 Method of identifying stamper for optical information storage disk |
| 01/08/1991 | US4983505 Optical recording medium |
| 01/08/1991 | US4983479 Method of manufacturing a laminated element and the element thus obtained |
| 01/08/1991 | US4983440 Transparent plastic substrate with roughened surface, thin metal film of specific thermal conductivity of platinum group metal and second metal or semi-metal |
| 01/08/1991 | US4983437 Compact disc protector |
| 01/08/1991 | US4983017 Optical head device for reading information stored in a recording medium |
| 01/08/1991 | US4983002 Optical head device |
| 01/08/1991 | CA1278860C Optical head in an optical memory device |
| 01/03/1991 | DE3920420A1 Optical components prodn. - by irradiating dye mols. in a polymer matrix with linearly polarised light to produce a structured variation in optical properties |
| 01/02/1991 | EP0406054A1 Access and tracking apparatus for optical disc |
| 01/02/1991 | EP0406021A2 Disk recording and reproducing device |
| 01/02/1991 | EP0405952A2 Semiconductor laser driving circuit |
| 01/02/1991 | EP0405898A2 Apparatus for producing substrate sheet for optical recording mediums, and process for producing substrate sheet therefor making use of it |
| 01/02/1991 | EP0405843A2 Molding material |
| 01/02/1991 | EP0405742A2 Method for increasing linear bit density in magneto-optical storage media |
| 01/02/1991 | EP0405741A2 Method for increasing track density of magneto-optical storage media |
| 01/02/1991 | EP0405670A1 Radiation-sensitive semiconductor device and reading or writing unit comprising such a radiation-sensitive semiconductor device |
| 01/02/1991 | EP0405610A2 Optical information recording method |
| 01/02/1991 | EP0405605A2 Optical recording process |
| 01/02/1991 | EP0405604A2 Magnetic optical recording/reproducing apparatus |
| 01/02/1991 | EP0405582A2 Method for making optically readable media containing embossed information |
| 01/02/1991 | EP0405568A2 Direct effect master/stamper for optical recording |
| 01/02/1991 | EP0405450A2 Data recording medium and method of manufacturing the same |
| 01/02/1991 | EP0405448A1 Purification of tellurapyrylium dyes |
| 01/02/1991 | EP0405444A2 Optical head |
| 01/02/1991 | EP0405432A2 Optical disk read/write head |
| 01/02/1991 | EP0405225A2 Information storage medium |
| 01/02/1991 | EP0404951A1 Optical recording medium and a method of producing the same |
| 01/02/1991 | EP0404942A1 Optical disk and movement control of its optical spot |
| 01/02/1991 | EP0201603B1 System for detecting tracking error of an optical head |
| 01/02/1991 | EP0145789B1 Disc-shaped recording medium |
| 01/02/1991 | CN1048279A Recording device for recording optically detectable information pattern on record carrier |
| 01/02/1991 | CN1011086B Contour lenses and mfr. method therefor |
| 01/01/1991 | US4982398 Optical recording apparatus for forming grooves and pits in an optically recordable disc |
| 01/01/1991 | US4982397 Apparatus for focusing a light beam onto an information memory medium having a data non-storage area |
| 01/01/1991 | US4982396 Information recording medium and apparatus using reversible phase change |
| 01/01/1991 | US4982395 Composite optical grating for optical disk data storage systems |
| 01/01/1991 | US4982394 Optical information recording/reproducing apparatus |
| 01/01/1991 | US4982393 Information recording and/or reproducing apparatus provided with means for detecting abnormality of tracking servo |
| 01/01/1991 | US4982392 Stabilized optical pick-up device inhibiting the effect of the focus error signal at the start and end of a data region |
| 01/01/1991 | US4982391 Method and apparatus for accessing a desired track of a recording medium during a stopped state of recording or reproduction |
| 01/01/1991 | US4982299 Linear motor locking mechanism in a disc unit |
| 01/01/1991 | US4982077 Recording format for optical recording medium |
| 01/01/1991 | US4982075 Information recording medium with track group indicators |
| 01/01/1991 | US4982074 Method of recording position information of last track recorded with data in directory area |
| 01/01/1991 | US4981777 Carbon-hydrogen-metal film |
| 01/01/1991 | US4981772 Optical recording materials comprising antimony-tin alloys including a third element |
| 01/01/1991 | US4981743 Protective coatings |
| 01/01/1991 | US4981538 Process for producing information recording medium |
| 12/31/1990 | CA2020175A1 Direct effect master/stamper for optical recording |
| 12/31/1990 | CA2019630A1 Acces and follower control device for optical disk |
| 12/31/1990 | CA2017229A1 Binary optical element for an optical disk read/write head |
| 12/29/1990 | CA2015900A1 Method for increasing track density of magneto-optical storage media |
| 12/29/1990 | CA2015899A1 Method for increasing linear bit density in magneto-optical storage media |
| 12/27/1990 | WO1990016065A1 Optical recorder |
| 12/27/1990 | WO1990015711A1 Read-write optical disk |
| 12/27/1990 | EP0404599A2 Optical memory device |
| 12/27/1990 | EP0404521A2 Optical recording medium and method for manufacturing the same |
| 12/27/1990 | EP0404449A2 Data-track search apparatus |
| 12/27/1990 | EP0404438A2 Optical pick-up head apparatus |
| 12/27/1990 | EP0404251A1 Recording device for recording an optically detectable information pattern on a record carrier |
| 12/27/1990 | EP0404249A1 Method of and device for adjusting recording parameters |
| 12/27/1990 | EP0404247A1 Device for recording information on a record carrier having a radiation sensitive layer |
| 12/27/1990 | EP0404040A1 Method of forming stable images on silicate glass articles |
| 12/27/1990 | EP0404005A1 Optical information recording medium |
| 12/27/1990 | EP0403971A2 Method of manufacturing optical components |
| 12/27/1990 | EP0403930A1 Infrared absorbing squarylium dyes for dye-donor element used in laser-induced thermal dye transfer |
| 12/27/1990 | EP0403797A2 The use of a light stabilizer comprising an aryl nitrogen compound for stabilizing an organic dye |
| 12/27/1990 | CA2018870A1 Purification of tellurapyrylium dyes |
| 12/25/1990 | USRE33506 Disc inclination detecting apparatus |
| 12/25/1990 | US4980882 Optical disk for detesting and distinguishing servo tracks from data tracks |
| 12/25/1990 | US4980881 Optical information carrier having buffer spaces for maintaining its flat shape |
| 12/25/1990 | US4980880 Method and apparatus for simultaneously reading both sides of an optical storage disk |
| 12/25/1990 | US4980879 Optical information recording and erasing method using two laser beams on a phase change optical recording medium |
| 12/25/1990 | US4980878 Method and apparatus for scanning a recording medium for defects |
| 12/25/1990 | US4980877 Optical recording and reproducing system with high track density and low cross-talk |
| 12/25/1990 | US4980876 In a disk storage system |
| 12/25/1990 | US4980426 Optical recording media |
| 12/25/1990 | US4980262 Producing a replicate video disc by a method of photographic contact printing |
| 12/25/1990 | US4979891 Mold for molding optical disk base |
| 12/25/1990 | US4979807 Biaspherical single lens for an optical information recording-reproducing apparatus |
| 12/24/1990 | WO1991000598A1 Master for optical element replication |
| 12/24/1990 | CA2057017A1 Master for optical element replication |
| 12/20/1990 | DE4006286A1 Optical disc playback system - has plates with aperture to remove unwanted signals and to increase resolution |
| 12/19/1990 | EP0403262A2 Electro-magnetic actuator and optical disk |
| 12/19/1990 | EP0403224A2 Method of reading recorded information from information storage medium with tracks |
| 12/19/1990 | EP0403196A2 Optical information recording-reproducing apparatus provided with a plurality of sample hold circuits |
| 12/19/1990 | EP0402678A2 Polycarbonate mixtures for optical devices |
| 12/19/1990 | EP0328556A4 Spherical pivoting actuator for read/record head |
| 12/18/1990 | US4979162 Apparatus for detecting the secondary distortion of optical type recorded information |
| 12/18/1990 | US4979159 Method of recording data onto an optical card having a plurality of tracks containing at least one ID section, error correcting code or directory pointer area and method of reproducing data therefrom |