Patents
Patents for G11B 19 - Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function (26,229)
02/1988
02/09/1988US4724495 Digital formatter, controller, and head assembly for video disk recording system, and method
02/09/1988US4724492 Recording disk data playback apparatus
02/09/1988US4723648 High speed rotational supporting device
02/09/1988CA1232681A1 Optical disk record player
02/03/1988EP0255240A2 Magnetic disk device using metallic film disk as data recording medium
02/02/1988US4723295 Recording disk data playback apparatus
02/02/1988US4723235 System for playing back information recorded on a disk recording medium with an improved discrimination and playback start operation
02/02/1988US4723234 Optical disc player
02/02/1988US4723185 Recording and/or reproducing apparatus
02/02/1988US4723181 Tape memory with integral disk index on reel
02/02/1988US4723180 Intermittent drive type magnetic recording apparatus
02/02/1988US4722505 Resilient mount with variable antivibration controls for record players
01/1988
01/27/1988EP0254328A2 Card accessing apparatus
01/27/1988EP0254285A2 High density storage of information on a compact disc
01/26/1988US4722078 Disc player
01/26/1988US4722077 Transcription control over plural interconnected modules
01/26/1988US4721850 Optical pickup device having a detector for detecting the light emitting intensity variation of a semiconductor light emitting element
01/26/1988CA1232064A1 Disk drive
01/20/1988EP0253626A2 Magnetic disc device
01/20/1988EP0252984A1 Magnetic recording/regenerating apparatus
01/20/1988CN87205568U Single recording and single playing multitrace radio cassette recorder
01/13/1988EP0252445A1 Apparatus for optically recording and reproducing information in record tracks on a rotatable record disc
01/12/1988US4719611 Apparatus for controlling a recording operation of an optical information recording apparatus
01/12/1988US4719524 Signal reproduction apparatus including touched state pattern recognition speed control
01/12/1988CA1231444A1 Flexible magnetic disk write protect device
01/07/1988EP0251666A2 Apparatus for recording and reproducing information
01/07/1988EP0251277A2 A recording/reproducing system for a magnetic recording medium
01/07/1988EP0251210A1 A security system for protecting information
01/05/1988US4718068 Stabilized laser device of optical information recording/reproduction apparatus
01/05/1988US4718054 Servo error write blanking circuit for an optical recording disk
01/05/1988US4717977 High capacity Winchester disk drive
01/05/1988US4717976 Apparatus using disc-shaped record bearing medium
01/05/1988US4717969 Apparatus for detecting servo-lock state in rotation of rotary recording medium
01/05/1988US4717968 Video player with power-down capability
01/05/1988US4717961 Electronic still camera preventing premature removal of recording disk
12/1987
12/29/1987US4716477 Mechanism for automatically loading a cassette in recording and/or reproducing apparatus including pinching means for applying varying pinching action
12/23/1987EP0250236A1 Low viscosity, electrically conductive ferrofluid composition
12/23/1987EP0249996A1 Optical recording and reproducing apparatus
12/23/1987EP0249781A2 Compact disc (CD) player
12/16/1987EP0249462A1 Recording disk reproducing apparatus
12/16/1987EP0249458A2 Method of accessing data recorded on a disk at a high speed
12/16/1987EP0249062A2 Disk drive actuator velocity limiting circuit
12/15/1987US4713704 Disk storage spindle arrangement
12/15/1987US4713703 Information recording and reproducing apparatus
12/09/1987EP0248092A1 Method for monitoring the performance of the head-disc-interface and device for preventing data losses due to magnetic head-disc-interferences
12/08/1987US4712208 Disc reproducing system for compensating mechanical imperfections
12/08/1987US4712204 Optical disk and method for reproducing reference signal therefrom
12/08/1987US4712203 Method and apparatus for thermo magnetic recording/erasing information with preselected magnetic field switching
12/08/1987CA1230178A1 Disc playback apparatus
12/03/1987DE3618236A1 Method and device for the electronic processing of stored video signals
12/02/1987EP0247219A1 Direct access storage unit
12/02/1987CN87103811A Optical disc player
12/01/1987US4710827 Servo apparatus
12/01/1987US4710825 Disc recording system with speed control
11/1987
11/25/1987EP0246830A2 Optical information recording and reproducing apparatus
11/25/1987EP0246542A2 Optical disc player
11/24/1987US4709282 Device for loading or unloading magnetic disc pack
11/24/1987US4709279 Read/write amplifier power control device for a disk apparatus
11/17/1987US4707818 Method and apparatus for recording digitized information on a disc
11/17/1987US4707751 Supporting device of a shaft drive of a magnetic record and reproduction device
11/17/1987US4707750 Automatic sequencer for a flexible disk loader/copier
11/12/1987DE3715602A1 Disc drive
11/10/1987US4706237 Disc player with strobe light illumination
11/10/1987US4706233 Control system for record changer apparatus
11/10/1987US4706138 Amplification of signals produced by a magnetic sensor
11/10/1987US4706005 Control circuit of direct current servomotor for floppy disk drive
11/10/1987CA1229173A1 Mass storage disk drive defective media handling
11/10/1987CA1229165A1 Direct read after write
11/04/1987EP0243973A2 Compact disk drive
11/04/1987EP0243625A2 DC motor speed control
10/1987
10/29/1987DE3713321A1 Computer-plattenlaufwerksystem Computer disk drive system
10/27/1987US4703379 Hard disk drive with erasing apparatus
10/27/1987US4703374 Magnetic disk memory having a disk pack seated at both sides in resiliently-designed housing
10/27/1987US4702101 Apparatus and method for testing the calibration of a hard disk substrate tester
10/21/1987EP0242215A2 Apparatus for data recording disc playback
10/21/1987EP0241770A1 A circuit for biasing a magnetoresistive sensor and amplifying signals produced thereby
10/21/1987EP0241515A1 Transducer positioning mechanism
10/20/1987US4701902 Automatic loading disc player
10/20/1987US4701901 Disc player
10/20/1987US4701898 Method and apparatus for locating a selected track on a record disc
10/20/1987US4701896 Interactive plural head laser disc system
10/20/1987US4701813 Method of protecting a magnetic recording medium in a magnetic recording/playback system and apparatus therefor
10/20/1987US4701653 Disk drive with internal brake and static discharge
10/20/1987CA1228421A1 Apparatus for reproducing information from a disc- shaped optically readable record carrier
10/14/1987EP0241081A1 Compact disc drive apparatus specifically designed for storage of digital data and/or mixture of audio information and digital data
10/14/1987EP0240678A2 Rotational velocity control with pulse width modulation
10/13/1987US4700338 Automatic loading disc player
10/13/1987US4700337 Control apparatus for a recording medium drive motor in a digital information reproducing apparatus
10/13/1987US4700245 Drive pin for a data transfer apparatus with a disklike record medium
10/13/1987US4700243 Power saving circuit arrangement for an apparatus for data transfer with flexible magnetic disk or the like
10/13/1987US4700095 Construction for installing a stepping motor of a floppy disk drive unit
10/06/1987US4698695 Recording disk data playback apparatus
10/06/1987US4698542 Brushless direct current motor system
09/1987
09/30/1987EP0238755A1 Video signal recording apparatus
09/23/1987EP0238194A2 Methods of and apparatus for recording signals on a disc-shaped recording medium
09/23/1987EP0237991A2 Card guide device
09/23/1987EP0237682A1 Control system for optical information reproducing apparatus
09/22/1987US4695995 Front loading disk player with improved disk sensor positioning
09/22/1987US4695993 Optical information recording and reproducing apparatus and optical disc
09/16/1987EP0237117A2 Recording and/or reproducing apparatus