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)
09/1995
09/05/1995US5448536 Magneto-optical recording device having an optical head capable of generating a circularly polarized light beam
09/05/1995US5448407 Equivalent wollaston prism for an optical pick-up head and an optical pick-up head using of the same
09/05/1995US5448048 Optical card recording/reproducing apparatus with presetting of card sector position data for detecting sector positions
09/05/1995US5447823 Metal chelate compound and optical recording medium using the compound
09/05/1995US5447778 Information recording medium and methods of manufacturing and using the same
09/05/1995US5447768 Optical disk with a bearing ring
09/05/1995US5447767 Optical recording medium, production thereof, substrate for optical recording medium, and production thereof
09/05/1995CA1336922C Recording device and reproducing device
08/1995
08/31/1995WO1995023487A1 Cellular radiotelephone system with remotely programmed mobile stations
08/30/1995EP0669613A1 Optical pickup system
08/30/1995EP0669612A2 Optical recording apparatus
08/30/1995EP0669611A1 Optical information recording method and recording apparatus
08/30/1995EP0669553A1 Apparatus for reading optical data from a motion picture film and a light source therefor
08/30/1995EP0669548A1 Optical element and process for producing the same
08/30/1995CN1107645A Disklike recording medium, apparatus for recording data on disk, and apparatus for reproducing data from disk
08/30/1995CN1107600A Optical information carrier
08/29/1995US5446724 Information storage medium with first and second recording regions each having a predetermined recording density
08/29/1995US5446723 Multiple data surface optical data storage system
08/29/1995US5446722 Information recording apparatus having magnetic shield means
08/29/1995US5446721 Objective lens drive device with support system
08/29/1995US5446719 Optical information reproducing apparatus
08/29/1995US5446718 Information recording and reproducing method and system for disc-shaped recording mediums
08/29/1995US5446717 Optical disc and recording and reproducing method for an optical disc with a high density
08/29/1995US5446716 Laser power control in an optical recording system to compensate for multiple system degradations
08/29/1995US5446713 Optical pickup drive control apparatus with vibration restraint
08/29/1995US5446712 Optical system having a precision angular displacement mechanism including a flat metal spring
08/29/1995US5446711 Apparatus for recording and/or reproducing information and/or from optical information record disk
08/29/1995US5446710 Focus error detection using an equal path length lateral shearing interferometer
08/29/1995US5446708 Pickup driving system for optical disk apparatus
08/29/1995US5446684 Storage medium, storage method and stored information reading method
08/29/1995US5446573 All-optical regenerator
08/29/1995US5446565 Compound objective lens having two focal points
08/29/1995US5446142 Phthalocyanine and naphthalocyanine light-absorbing compound and optical recording medium containing same
08/29/1995US5446141 Optical recording media, filters, liquid crystals display
08/29/1995US5446095 Compatible polymer blends
08/29/1995US5445855 Composed of an ethylene-cycloolefin copolymer substrate and an adhesive layer
08/29/1995US5445853 Low reflectivity, compactness, lightweight
08/29/1995US5445555 Resin material reclaimed from optical recording disk and method of reclaiming same
08/29/1995US5445172 Wafer holder with flexibly mounted gripping fingers
08/29/1995CA2017501C Recording/reproducing device
08/24/1995WO1995022822A1 Optical scanning device
08/23/1995EP0668588A1 Recorded signal detection apparatus
08/23/1995EP0668584A1 Preformatted substrate, preformatted substrate having information to be duplicated, their methods of manufacture, and method of manufacture of a master disk or optical disk
08/23/1995EP0570415B1 Optical scanning device
08/23/1995EP0504300B1 A tracking system in an optical recording/reproducing device
08/23/1995EP0483387B1 Dye composition and optical recording medium
08/23/1995EP0378222B1 Magnetic recording medium and method of magnetically recording and reading data
08/22/1995US5444726 Semiconductor laser device
08/22/1995US5444690 Leaf spring lock for a carriage in a media player that is actuated by the carriage and position of a cartridge
08/22/1995US5444689 Detection of phase and amplitude modulation information on optical medium with a waveguide
08/22/1995US5444687 Method and device for accessing an optical disc
08/22/1995US5444684 Seek control system of dual processor magneto-optic disk unit
08/22/1995US5444683 Optical reporting reproducing device having fixed and movable optical systems
08/22/1995US5444682 Tracking control apparatus
08/22/1995US5444681 Method and apparatus for recording signals with sub-signals indicative of outline of the signals
08/22/1995US5444680 Digital signal processing apparatus with a read error correction function
08/22/1995US5444679 Optical disk driver for reading data from a disk based on ID information
08/22/1995US5444677 Optical read/write head low angle beamsplitter and coplanar detectors
08/22/1995US5444371 Magnetic disk offset amount measuring apparatus
08/22/1995US5444233 Optical or magnetooptical information recording/reproducing apparatus and a focusing pull-in method for such apparatus generating a light beam for focusing error signal detection
08/22/1995US5444224 Optical information recording/reproducing apparatus
08/22/1995US5443940 Optical recording material and optical recording medium employing the same
08/22/1995CA2033230C Optical head
08/22/1995CA2023869C Optical disk recording/reproducing device
08/17/1995WO1995022142A1 Method and recording device for recording signals on a record carrier
08/17/1995WO1995021890A1 Disc repair system
08/16/1995EP0667661A2 Semiconductor laser and method for manufacturing the same
08/16/1995EP0667608A1 A method of manufacturing a matrix for producing optical disks without the medium of a master
08/16/1995EP0667024A1 Cd mastering process
08/16/1995EP0473677B1 High fidelity film sound reproduction device
08/16/1995CN1106794A Preparation of polymerizable monomer used for transparent resin having high hardness
08/15/1995US5442619 Erasable optical recording medium with a reversible light absorption layer
08/15/1995US5442618 Common mode rejection control in an optical disk drive
08/15/1995US5442617 Digital noise blanking circuit of CD-ROM system
08/15/1995US5442616 Light source unit and method of adjusting for maximizing focus and tracking errors thereby
08/15/1995US5442615 Optical plate for correcting comatic aberration
08/15/1995US5442614 Method of recording data and information regarding defects
08/15/1995US5442613 Optical information recording/reproduction apparatus to stop recording operation upon detecting error in access operation to target track
08/15/1995US5442611 Method of recording information on record medium having data record region and file management information record region
08/15/1995US5442610 Method for processing an anomalous writing in an optical disk apparatus
08/15/1995US5442609 Tracking error signal correcting system which adjusts gain such that rending tracking error signals and recording trucking error signals and recording tracking error signals are equal
08/15/1995US5442608 Disk apparatus having a power consumption reducing mechanism
08/15/1995US5442607 Jump pulse corrector and optical disk unit
08/15/1995US5442606 Electromagnetic lens actuator for optical disk drive
08/15/1995US5442605 Head driving device with carriage assembly centroid position set where servo frequency is not delayed
08/15/1995US5442604 Access control device
08/15/1995US5442490 Objective lens driving apparatus
08/15/1995US5442455 Two-sided video disc having high definition television video signals recorded thereon and a method of manufacturing the same
08/15/1995US5442433 Identification system for an article having individually attached patches
08/15/1995US5441848 Organic dye base recording layer and reflective layer on grooved resin substrate; signals are written using light source in groove
08/15/1995US5441844 Optical information recording medium using bisazo or trisazo compounds
08/15/1995CA2029719C Optical disc reproducing apparatus
08/10/1995WO1995021444A1 Process for cutting central holes in cd's
08/10/1995WO1995021045A1 Process for removing the coating of metallised disk-shaped information carriers
08/10/1995DE4403169A1 Verfahren zum Einbringen von Mittellöchern in CD's Method for introducing center holes in CD's
08/10/1995DE19503165A1 Optical record-playback system with scanning read-write heads
08/09/1995EP0666565A2 Card drive apparatus and card
08/09/1995EP0666561A1 Spin-transition chemical compounds, and devices comprising read-, memory-, and erase-units, active medium which contains at least one of those compounds
08/09/1995EP0666495A1 Motion picture digital sound system and method
08/09/1995EP0483382B1 Metal chelate compound and optical recording medium prepared therefrom