Patents
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)
07/1999
07/15/1999CA2318350A1 Magnetic engraving method, in particular for magnetic or magneto-optical recording
07/14/1999EP0929066A2 Information recording medium, apparatus and control method therefor
07/14/1999EP0928971A1 Automatically adapting forward or reversed biased photodiode detection circuit
07/14/1999EP0928816A2 Phthalocyanine compound, its intermediate, process for producing the compound, and use thereof
07/14/1999EP0928482A2 Multi-surfaced, single sided optical disc
07/14/1999EP0928481A2 Integrated optical head apparatus and associated methods
07/14/1999EP0928243A1 Method and apparatus for glueing together disc elements
07/14/1999EP0807346A4 Cd-prom
07/14/1999CN1222990A Storage medium and manufacture thereof
07/14/1999CN1222731A Disk recording or playback device and method of controlling pickup of device
07/14/1999CN1222728A Real-time regulating apparatus and method for objective optical-axis of optical pick-up device
07/14/1999CN1222727A Optical pickup and optical disk unit
07/14/1999CN1222725A Disc apparatus
07/14/1999CN1222724A Recording and/or reproduction apparatus, file management method and providing medium
07/14/1999CN1222723A Recording/reproducing apparatus and method recording medium
07/13/1999US5923869 Method and an apparatus for reproducing bitstream having non-sequential system clock data seamlessly therebetween
07/13/1999US5923640 Optical disc with a rewritable area and a read-only area
07/13/1999US5923639 Phase-change optical recording medium having an additive related to the writing line speed
07/13/1999US5923636 Optical pickup
07/13/1999US5923635 Optical information recording or playbacking system, optical head apparatus used in the system and method for recording or playbacking optical information
07/13/1999US5923634 Optical disc having surface portions configured to each represent at least two bits of data
07/13/1999US5923633 Optical reproducing device compatible with multiple media recording densities
07/13/1999US5923632 Optical pick-up device for a multi-layer recording medium with a photodetector arrangement for focusing and tracking control
07/13/1999US5923631 Optical information recording/reproducing apparatus including a beam axis adjusting device for adjusting a position of a beam incident to a diffraction grating
07/13/1999US5923627 For providing video signals
07/13/1999US5923626 Recording or playback devices for optical information carriers having a different track width
07/13/1999US5922504 Optical recording elements having recording layers containing mixtures of no k metallized formazan and cyanine dyes
07/13/1999US5922430 Compact disk protector
07/13/1999US5922429 Optical recording elements having recording layers containing mixtures of low k metallized formazan and cyanine dyes
07/13/1999US5922177 Magneto-optical recording medium and producing method thereof
07/13/1999CA2151670C Optical tape cartridge
07/13/1999CA2045512C Data recording method and data reproducing apparatus
07/09/1999CA2258382A1 Disk recording or playback device and method of controlling pickup of the device
07/08/1999WO1999034362A1 Optical recording medium and process for producing the same
07/08/1999WO1999034361A1 Optical recording medium and process for producing the same
07/08/1999WO1999034360A1 Actuator for objective lenses
07/08/1999WO1999034359A2 Optical record carrier and scanning device
07/08/1999WO1999034358A2 Multidimensional optical recording medium and recording and playback apparatus of the same
07/08/1999WO1999034355A2 Method for reading information and device for realising the same
07/08/1999WO1999014755A3 Optical disc recording apparatus, computer-readable recording medium recording a file management program, and optical disc
07/07/1999EP0927996A2 Optical disk drive capable of playing card type optical disk
07/07/1999EP0927995A1 Optical recording medium and method of its manufacture
07/07/1999EP0927994A1 Optical information recording medium
07/07/1999EP0927993A2 Track loss signal generating apparatus used in optical disc drive and optical disc drive equipped wih the apparatus, as well as optical disc drive equipped with amplitude adjusting apparatus for tracking error signal
07/07/1999EP0927888A1 Automatically adapting forward or reversed biased photodiode detection circuit
07/07/1999EP0927419A1 Optical recording medium comprising a cross-linked buffer layer
07/07/1999CN1221951A Optical pickup actuator for both compact disc and digital video disc
07/07/1999CN1221950A Focus position regulator and CD driving device
07/07/1999CN1221949A Audio information recording medium and audio information reproducing apparatus
07/07/1999CN1221948A Information record medium,and apparatus for and method of reproducing the same
07/07/1999CN1221947A Optical disk drive capable of playing card type optical disk
07/07/1999CN1221946A 数据信号重现方法和系统 Data signal reproduction method and system
07/07/1999CN1221944A Method for processing data of deffct sector in DVD-RAM system
07/07/1999CN1221883A Automatically adapting forward or reversed biased photodiode detection circuit
07/07/1999CN1221685A Admission document
07/07/1999CN1044045C Tracing system and method using servo-data magnetic sensor and photolithoyraphic magnetic disc track
07/06/1999US5920661 Information recording medium and information reproducing apparatus
07/06/1999US5920585 Laser diode package having an optical power monitoring function
07/06/1999US5920540 Optical disk having address information in lands and grooves, and an information recording/reproduction method
07/06/1999US5920539 Apparatus and method for suppression of electromagnetic emissions having a groove on an external surface for passing an electrical conductor
07/06/1999US5920538 Magneto-optical readout method and magneto-optical readout head and method for making same
07/06/1999US5920537 Correction element of lower light intensity around an optical axis of an optical head with a plurality of focal points
07/06/1999US5920536 Method and apparatus for holographic data storage system
07/06/1999US5920535 Automatic editing/recording device and dubbing system loaded with the device
07/06/1999US5920534 Optical disk apparatus
07/06/1999US5920533 Clock signal extraction system for high density recording apparatus
07/06/1999US5920532 Information pick-up apparatus and optical disk apparatus
07/06/1999US5920530 Rotation control apparatus operating with a sync signal having variable intervals
07/06/1999US5920528 Optical disc apparatus and method of tracking control of optical disc apparatus
07/06/1999US5920527 Apparatus and method for accessing multiple recording layers of a disk
07/06/1999US5920526 Method for detecting a boundary between recorded and unrecorded areas on an optical disc
07/06/1999US5920441 Method and apparatus for controlling a multiple-stage actuator for a disk drive
07/06/1999US5920438 Programmable digital centerline tracking threshold apparatus and method
07/06/1999US5920437 Objective lens driving apparatus
07/06/1999US5920329 Optical information medium and method for printing on the surface of the medium
07/06/1999US5919950 Squarylium compounds, and processes and intermediates for the synthesis of these compounds
07/06/1999US5919928 Phenanthridine derivatives and metal complexes thereof used for transparent recording medium or optical recording medium
07/06/1999US5919607 Photo-encoded selective etching for glass based microtechnology applications
07/06/1999CA2120740C Optical data storage disc
07/01/1999WO1999033093A1 Vacuum treatment installation
07/01/1999WO1999033053A1 Method and apparatus for maximum likelihood detection
07/01/1999WO1999033052A1 Optical recording medium and method of producing the same, and recording signal reproducing device for the medium
07/01/1999WO1999031956A2 Automated servo gain adjustment using fourier transform
07/01/1999WO1999026243B1 System and method of encoding for identifying a given surface among several identically patterned disk surfaces
07/01/1999DE19860054A1 Optical head for optical disc system
07/01/1999DE19859529A1 Rewritable optical disk comprises recording area divided into groups by annular boundaries with spare area with sectors to be allocated in place of defective sections
07/01/1999DE19843153A1 Read circuit for disc player
06/1999
06/30/1999EP0926669A1 Method for controlling rotary storage medium having electronic circuit and system therefor
06/30/1999EP0926667A2 Disk player
06/30/1999EP0926666A2 Optical pickup position control device
06/30/1999EP0926665A2 Optical information recording/reproducing apparatus
06/30/1999EP0926664A2 Optical disk and optical disk apparatus
06/30/1999EP0926663A2 Optical storage medium and reproduction of data therefrom
06/30/1999EP0926662A2 Optical disc device
06/30/1999EP0926575A1 Automatic setting of gain in control loops
06/30/1999EP0926258A2 Getter system for purifying the working atmosphere in physical vapor deposition processes
06/30/1999EP0926180A2 A polycarbonate copolymer and applications thereof
06/30/1999EP0925582A2 Device for curing an adhesive between two layers of an information carrier
06/30/1999EP0925581A1 Machine-readable optical disc with reading-inhibit agent
06/30/1999CN2327046Y Light-disk repairing machine