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

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)
12/1988
12/20/1988	CA1246910A1 Focussing error detecting apparatus
12/15/1988	WO1988009990A1 Optical storage disk and method of its manufacture
12/15/1988	WO1988009989A1 Device for reading optical recording medium and optical detector therefor
12/15/1988	WO1988009988A1 Data reproduction device
12/15/1988	WO1988009958A1 Optical recording material
12/15/1988	WO1988009957A1 Optical recording material
12/15/1988	DE3718435A1 Optically readable information carrier in disk form and process for its production
12/14/1988	EP0295145A2 Recording method and recording apparatus
12/14/1988	EP0294969A2 Recording medium for optical data storage
12/14/1988	EP0294932A2 A method for recording and erasing information
12/14/1988	EP0294902A1 Optical scanning device, mirror objective suitable for use therein and an optical recording and/or reproducing apparatus provided therewith
12/14/1988	EP0294831A2 Wavelength selective optical recording and reproducing method
12/14/1988	EP0294545A2 Head positioning device for optical disk drive
12/14/1988	EP0294490A1 Optical disc discriminating device
12/14/1988	EP0294489A1 Optical disc and optical disc unit
12/14/1988	EP0294461A1 Solid particle dispersion filter dyes for photographic compositions.
12/14/1988	EP0294445A1 Read/write head adjusting motor assembly
12/13/1988	US4791650 Phased-array semiconductor laser apparatus
12/13/1988	US4791627 Wobbled pit recording method and device of optical recording medium utilizing a plurality of time different signal waveforms
12/13/1988	US4791625 Optical pickup device using an intermediate lens which slightly converges the light beam
12/13/1988	US4791623 File management system for use in an optical data storage system
12/13/1988	US4791622 Optical data format employing resynchronizable data sectors
12/13/1988	US4791044 Disk type information recording medium
12/13/1988	US4791023 A-diimine metal complexes
12/13/1988	US4790628 Apparatus for actuating objective lens
12/13/1988	CA1246739A1 Optical disc
12/13/1988	CA1246379A1 Recording medium for optical data storage
12/07/1988	EP0294241A2 Optical record/reproduction apparatus
12/07/1988	EP0294174A2 Recording elements comprising write-once thin film alloy layers
12/07/1988	EP0294173A2 Recording elements comprising write-once thin film alloy layers
12/07/1988	EP0293778A2 Optical recording medium and recording process utilizing the same
12/07/1988	EP0293769A2 Polycarbonate for disc substrate
12/07/1988	EP0293741A2 Flat, multilayered, laseroptical recording material
12/07/1988	EP0293651A2 Dicyanovinyl-substituted furan derivatives, process for their preparation, and their use
12/07/1988	EP0293495A1 Optical memorizing device
12/07/1988	EP0293494A1 Memorizing device with moving information carriers
12/07/1988	EP0293493A1 Optical-mechanical memorizing device
12/07/1988	EP0293468A1 Distribution of clock indicia for a quasi-constant linear-velocity disk
12/06/1988	US4789979 Optical disk exclusively used for reproduction wherein guide grooves located between data managing information and data recording regions have no track address sections
12/06/1988	US4789978 System and method of astigmatism correction in an optical head apparatus
12/06/1988	US4789977 Optical data recording device
12/06/1988	US4789976 Temperature compensation circuit for a delay circuit utilized in an FM detector
12/06/1988	US4789974 Optical information recording/reproducing apparatus
12/06/1988	US4789965 Methods and compositions for recording optical information employing molecular pseudorotation
12/06/1988	CA1246220A1 Data system containing a high capacity optical contrast laser recordable wallet-size plastic card
12/06/1988	CA1246217A1 Apparatus for reading a disc-shaped record carrier
12/01/1988	WO1988009549A1 Optical data storage method and materials therefor
12/01/1988	DE3716655A1 Device for reproducing data
11/1988
11/30/1988	EP0292942A1 Apparatus for reproducing signals from both sides of discs
11/30/1988	EP0292917A1 Apparatus for information recording and/or reproducing on or from an optical disc
11/30/1988	EP0292722A1 Use of mixtures of thermoplastic polycarbonates and copolymers of styrene with acrylonitrile as substrates for optical data memories
11/30/1988	EP0292720A2 Method and apparatus for feeding card
11/30/1988	EP0292675A2 Irreversible optical recording media and method of manufacture
11/30/1988	EP0292578A1 Information storage device
11/29/1988	US4788678 Optical information recording media substrate
11/29/1988	US4788677 Disk support mechanism in a player
11/29/1988	US4788674 Optical disc record reproducing apparatus
11/29/1988	US4788672 Method and apparatus for controlling renewal of data in optical disc memory
11/29/1988	US4788671 Information recording and reproducing apparatus for effecting simultaneous recording and reproduction but at different rates
11/29/1988	US4788562 Polypyrrole light absorbing layer
11/29/1988	US4788561 Tellurium, or oxide thereof, amorphous layer with tellurium crystal layer
11/29/1988	US4788421 Apparatus for controlling relative movement of an optical head to an optical disk with velocity detection
11/29/1988	US4788129 High contrast optical memory tape
11/29/1988	US4788097 Containing low melting metal, metal sulfide, fluoride, or oxide with high surface tension
11/29/1988	US4788015 Process for preparation of optical disk substrate
11/29/1988	CA1245763A1 Phase changeable material
11/29/1988	CA1245762A1 Reversible optical information recording medium
11/24/1988	DE3723923A1 Device for the reproduction of data
11/23/1988	EP0292289A2 Optical pick-up device
11/23/1988	EP0292258A2 Optical information recording and reproducing apparatus
11/23/1988	EP0292240A2 Optical data storage system with wavelength selective lamination
11/23/1988	EP0292107A2 Optical pickup device
11/23/1988	EP0292065A1 Assembly comprising a first element to which a second element is secured by means of an adhesive, and device comprising the assembly
11/23/1988	EP0291911A2 Variable inductance lens position transducer
11/23/1988	EP0291848A2 Optical-recording medium comprising a reflective layer containing a silicon-phthalocyanin compound
11/22/1988	US4787078 Optical data recording and reproducing system with control of high frequency superposed signal applied to semiconductor laser
11/22/1988	US4787077 Controlled laser spot melting of germanium-tellurium film; quenching at varying rates
11/22/1988	US4787076 Optical disc tracking system with switching of tracking error signals at boundary between track guide and track address
11/22/1988	US4787075 Optical information recording medium and apparatus for recording/reproducing information using the same
11/22/1988	US4787009 Optical disk
11/22/1988	US4786980 Image information recording system
11/22/1988	US4786849 Offset compensating circuit in fine control servo device
11/22/1988	US4786794 Focus servo-circuit with ordered reference level setting means
11/22/1988	US4786792 Optical data storage and retrieval system
11/22/1988	US4786709 Organic high molecular liquid crystals
11/22/1988	US4786585 Image forming and data storage
11/22/1988	US4786575 Pigment for electrophotographic recording processes
11/22/1988	US4786538 Tellurium oxide and suboxide
11/17/1988	WO1988009030A1 Optical recording member, its production and production of optical recording card
11/17/1988	WO1988009021A1 Read-only optical card and system
11/17/1988	EP0290979A2 Information reader for disk player
11/17/1988	EP0290882A1 Apparatus for the reproduction of data
11/17/1988	DE3714804A1 Optical information storage disc
11/17/1988	DE3714803A1 Optical device for recording and reproducing an item of information stored on a storage dis
11/17/1988	DE3714621A1 Device for testing optical information carriers
11/17/1988	DE3714050A1 Method of correcting a defect in tracks of a recording carrier for digital signals
11/15/1988	US4785444 Optical recording disc
11/15/1988	US4785443 Light control circuit of optical disc system
11/15/1988	US4785442 Light spot position control system and method by sampling servo
11/15/1988	US4785441 Tracking error correction apparatus utilizing phase difference information derived from four photocells

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