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) |
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03/27/1990 | US4912581 Magazine for supporting a plurality of magnetic disc packs each housing a magnetic disc |
03/27/1990 | US4912570 Recording and/or reproducing device |
03/22/1990 | WO1990003031A1 Recording/reproducing apparatus |
03/22/1990 | WO1990003029A1 Rotating positioning device for magnetic disk memories |
03/22/1990 | DE3930607A1 Unterscheidungsvorrichtung zum genauen unterscheiden zwischen wiedergabearten eines aufgezeichneten videosignals Discriminating apparatus for accurately distinguish between types of playback of a recorded video signal |
03/21/1990 | EP0359541A2 Optical-disk playback apparatus, method of optical-disk playback and combined memory medium |
03/20/1990 | US4910722 Optical information recording and reproducing apparatus |
03/20/1990 | US4910670 Sound generation and disk speed control apparatus for use with computer systems |
03/20/1990 | US4910616 Servo track centering for magnetic disc read/write head |
03/20/1990 | US4910479 Automatic gain control device for use in an optical memory device |
03/20/1990 | CA1266877A1 Electronically commutated dc machine and use thereof |
03/14/1990 | EP0357889A2 Demagnetization of thin film magnetic recording transducers utilizing a decreasing AC current |
03/13/1990 | US4908812 Synchronizing signal reproducing circuit in a disc playback device |
03/13/1990 | US4908810 Method and apparatus for controlling a spindle servo using pickup position and shift information |
03/13/1990 | US4907897 Bearing device |
03/13/1990 | CA1266719A1 Precision spindle |
03/07/1990 | EP0357430A2 Multispeed reproducing control apparatus of a video disk player |
03/07/1990 | EP0357419A2 Optical data recording and readout apparatus |
03/07/1990 | EP0356984A2 Disc player |
03/07/1990 | EP0356763A2 Apparatus and method of accessing a medium with low power consumption |
03/07/1990 | EP0164131B1 Information recording medium disc and method and apparatus for recording/reproducing information |
03/07/1990 | CN1040282A Reproducing and/or recording apparatus |
03/06/1990 | US4907111 Locking device for floppy disk drives |
03/06/1990 | US4907106 Head slider driving mechanism for a magnetic disk apparatus |
03/06/1990 | US4907105 Synchronized spindle control for disk drives |
03/06/1990 | US4907098 Information recording-reproducing apparatus |
03/06/1990 | US4906874 Analog signal switching device for use in an optical memory |
02/28/1990 | EP0356201A2 Optical recording element and driving system |
02/27/1990 | US4905110 Disk drive spindle motor |
02/27/1990 | US4904938 Method and apparatus for testing characteristics of a floppy disc and a floppy disc drive |
02/22/1990 | WO1990001772A1 Overwrite-type magnetooptical recording medium cartridge |
02/22/1990 | WO1990001769A1 Overwrite type magnetooptical recording apparatus |
02/22/1990 | WO1990001737A1 Single disk emulation for synchronous disk array |
02/20/1990 | US4903157 Electromagnet-actuated head latching apparatus |
02/20/1990 | US4903155 Disc drive |
02/20/1990 | US4903140 Apparatus for reproducing signals from both sides of discs |
02/20/1990 | US4902941 Drive motor for information-storage-disk devices |
02/14/1990 | EP0354248A1 Device for driving a floppy disc |
02/13/1990 | US4901300 Method of and apparatus for recording an information signal |
02/13/1990 | US4901173 Apparatus for coupling record disk to disk drive |
02/13/1990 | US4901170 Rotary head type digital signal reproducing method |
02/13/1990 | US4901169 Data recording apparatus able to accurately access a floppy disk regardless of recording density |
02/13/1990 | US4900958 Drive motor for magnetic disks, optical disks, and magneto-optical disks |
02/13/1990 | US4900908 Card accessing apparatus having a head disposed under a card feeding stage |
02/07/1990 | EP0353866A1 Compact magnetic fluid low pressure seal |
02/07/1990 | EP0353852A2 Method and circuitry to suppress additive disturbances in data channels containing MR sensors |
02/06/1990 | US4899331 Random reproducing system for disk player |
02/06/1990 | US4899326 Magazine-housed disk player |
02/06/1990 | US4899237 Divided housing for supporting magnetic disks |
02/06/1990 | US4898480 Compact ferrofluidic electrically conducting sealed bearing |
02/01/1990 | DE3920504A1 Magnetic head |
01/31/1990 | EP0352728A2 DC motor stop detector and DC motor brake apparatus |
01/30/1990 | US4897746 Magnetic head device |
01/30/1990 | US4897740 Recording/reproducing system for a magnetic recording medium including synchronization detecting circuit |
01/30/1990 | CA1265241A1 Disk drive positioning system providing passive head crash protection |
01/25/1990 | WO1990000771A1 Data security device |
01/24/1990 | EP0352214A2 D.C. motor |
01/24/1990 | CN1039162A Phase-control circuit |
01/23/1990 | US4896311 Disk apparatus |
01/23/1990 | US4896232 Chucking mechanism for floppy disk drive |
01/23/1990 | US4896226 Multi-motor electronic still camera having recording disk, focal plane shutter, and optical filters |
01/18/1990 | DE3914128A1 Multi-compartment magazine record player |
01/16/1990 | US4894817 Method of writing data on optical card by projecting thereon intensity modulated light beam |
01/16/1990 | US4894814 Optical disc player with pause function in response to elapsed preset maximum playback time period |
01/16/1990 | US4894738 Disk storage drive |
01/16/1990 | US4894525 Optical power control device for semiconductor light emitting element |
01/11/1990 | WO1990000337A1 Image storage and retrieval apparatus |
01/11/1990 | WO1990000300A1 Seeking multitasking disk controller |
01/11/1990 | DE3921982A1 Protective circuit for optical disc players |
01/11/1990 | DE3914239A1 Einrichtung zum schutz von daten Means for protection of data |
01/09/1990 | US4893293 Method for operating multidisk player |
01/09/1990 | US4893200 Composite magnetic head |
01/09/1990 | US4893193 Disc recording medium and apparatus for playback thereof |
01/09/1990 | US4892423 Rotary actuator and fabrication process therefor |
01/09/1990 | US4892418 Hydrodynamic bearing device |
01/03/1990 | EP0349279A2 Arrangement of recording/reproducing apparatus |
01/02/1990 | US4891727 Memory device |
12/28/1989 | WO1989012889A1 Magnetooptical recording apparatus |
12/27/1989 | EP0348197A2 Linear motor locking mechanism in a disc unit |
12/27/1989 | EP0348027A2 Magneto-resistive sensor with opposing currents for reading perpendicularly recorded media |
12/27/1989 | EP0347858A2 Optical disc and recording and reproducing apparatus employing the optical disc |
12/27/1989 | CN1006258B Control method and circuit for starting the optical disc playback system |
12/26/1989 | US4890276 Optical disc player |
12/26/1989 | US4890272 Apparatus for correcting photodetector signals in a system for retrieving information from an optical recording medium |
12/26/1989 | US4890174 Rotary voice coil micro-hard disk drive system |
12/26/1989 | US4890045 Spindle motor control system for magnetic disk apparatus |
12/20/1989 | EP0346979A2 Reproducing and/or recording apparatus |
12/20/1989 | EP0346664A1 Phase-controlling loop |
12/19/1989 | US4888756 Optical information recording and reproducing apparatus |
12/19/1989 | US4888751 Image information processing apparatus |
12/18/1989 | WO1989012932A1 Phase-control circuit |
12/14/1989 | DE3918953A1 External rotor motor without a commutator |
12/13/1989 | EP0346063A2 Magneto-optical information recording method and apparatus |
12/13/1989 | EP0346052A2 Timer apparatus |
12/13/1989 | EP0345917A2 Apparatus and method of stop control for a spindle motor |
12/13/1989 | EP0345556A1 Counter circuitry for motor rotation speed control circuitry |
12/13/1989 | EP0221097B1 Elastic support system with adjustable shock absorption for record players |
12/13/1989 | CN1006100B Electro-optical device |
12/12/1989 | US4887254 Optical disk drive device for positioning a carriage to a retract position |
12/12/1989 | US4887253 Scanning method and apparatus for performing track jump operations in disk player |