| 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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| 06/26/1990 | US4937804 Apparatus for recording data into optical recording medium |
| 06/26/1990 | US4937802 Magnetic head drive circuit |
| 06/26/1990 | US4937800 Method of recording using selective-erasure directions for magnetooptic record members |
| 06/26/1990 | US4937695 Recording and/or reproducing apparatus |
| 06/26/1990 | US4937687 Memory unit capable of detecting error in regenerated data from a memory medium |
| 06/26/1990 | US4937684 Information recording-reproducing apparatus |
| 06/26/1990 | US4937440 System and method for beam farfield shift focus compensation |
| 06/26/1990 | US4937438 Magnetic encoding apparatus and method |
| 06/20/1990 | EP0374129A2 Image information recording apparatus |
| 06/19/1990 | US4935917 Memory disk having some capacity recording areas on a spiral track |
| 06/19/1990 | US4935916 Apparatus for recording and reproducing information including energy storing means |
| 06/19/1990 | US4935915 Beam controller for magneto-optical disc memory system |
| 06/19/1990 | US4935914 Optical recording and reproducing apparatus for verifying correct writing of information signal |
| 06/19/1990 | US4935828 Seek multitasking disk controller |
| 06/14/1990 | WO1990006579A2 Improved disc unit |
| 06/13/1990 | EP0373131A2 Pulse generator including a pattern provided on a rotor of a motor |
| 06/13/1990 | EP0372974A2 Optical disk apparatus |
| 06/13/1990 | EP0372638A1 Turntable assembly, method of manufacturing a turntable assembly, and disc player comprising a turntable assembly |
| 06/13/1990 | EP0246298B1 A storage disk drive mechanism and hub member |
| 06/13/1990 | DE3940216A1 Wiedergabeverfahren fuer aufgezeichnete information Reproducing method for recorded information |
| 06/12/1990 | US4933795 Floppy disc read and write head having two separate read and write cores for multiple track density and recording frequencies |
| 06/12/1990 | US4933785 Disk drive apparatus using dynamic loading/unloading |
| 06/12/1990 | US4933783 AGC circuit with transient response control in a magnetic disk unit |
| 06/12/1990 | US4933619 Stepping motor servo control system for a floppy disk drive |
| 06/12/1990 | US4933537 Apparatus for controlling movement of an optical memory card for data transfer therewith |
| 06/06/1990 | EP0371961A2 Magnetic recording/reproduction apparatus |
| 06/06/1990 | EP0371777A2 Magnetic disk drive |
| 06/06/1990 | CN1042787A Circuit device for identifing the type of optical recording medium |
| 06/05/1990 | US4932016 Apparatus and method of recording and reproducing data using a disk |
| 06/05/1990 | CA1270059A1 Method of detecting the position of an optical head |
| 05/31/1990 | WO1990005982A1 Method and apparatus for improved thermal isolation and stability of disk drives |
| 05/31/1990 | WO1990005977A1 Circuit arrangement for identifying the type of an optical record carrier |
| 05/31/1990 | WO1990005974A1 High density disc drive with magnetic clutch and a removable cartridge |
| 05/31/1990 | WO1990005961A1 Magnetic encoding apparatus and method |
| 05/30/1990 | EP0371006A2 Magnetic recording apparatus |
| 05/30/1990 | EP0370483A2 Information reproducing apparatus |
| 05/29/1990 | CA1269753A1 Method and means for parking read/write heads in a disc drive using the back- emf of the spindle motor to operate a stepper motor |
| 05/23/1990 | EP0369018A1 Method of instructing the initialization of an external memory medium |
| 05/23/1990 | DE3838970A1 Counter for video disks or similar information carriers with internal or external display |
| 05/23/1990 | CA2003897A1 Magnetic encoding apparatus and method |
| 05/22/1990 | US4928192 Process for identifying disks and automatically configuring a disk drive system |
| 05/22/1990 | US4928190 Magnetic recording/reproduction apparatus |
| 05/22/1990 | US4928044 For applying a reverse torque braking force to a spindle motor |
| 05/22/1990 | US4928029 In-spindle motor assembly for disk drive and method for fabricating |
| 05/16/1990 | EP0368416A1 System for recording and/or reading signals on/from information carriers in cassettes |
| 05/16/1990 | EP0137855B1 Data transfer system using digital disc |
| 05/15/1990 | US4926408 Magneto-optic recording/erasing system with simultaneous dual head control and disk error detection |
| 05/15/1990 | US4926101 DC motor stop detector and DC motor brake apparatus |
| 05/15/1990 | US4926082 Superconductor devices for disk drives |
| 05/14/1990 | CA2000477A1 High density disk drive with magnetic clutch and a removable cartridge |
| 05/09/1990 | EP0367370A2 Disc player having automatic disc ejection, and method of providing same |
| 05/08/1990 | US4924333 Seek control apparatus and method for preventing head in a floppy disk apparatus from being outwardly moved beyond an outermost track |
| 05/08/1990 | US4924330 System and method for improving the performance of high-density data storage media |
| 05/08/1990 | US4924327 System and method for improving the performance of high-density data storage media |
| 05/08/1990 | US4923406 Spindle motor flex cable |
| 05/02/1990 | EP0366291A2 Disc player with manual search function |
| 05/02/1990 | EP0366000A2 Method and arrangement to avoid read-out errors attributed to wear in a magnetic information storage device |
| 05/01/1990 | US4922513 Rotation control circuit for a hall motor |
| 05/01/1990 | US4922406 Labyrinth seal in disk storage drive |
| 05/01/1990 | US4922351 Optical information recording and reproducing apparatus |
| 04/25/1990 | EP0365306A1 Disc recording apparatus |
| 04/25/1990 | EP0364586A1 Disk recording apparatus |
| 04/24/1990 | CA1268252A1 Information recording method |
| 04/24/1990 | CA1268223A1 Amplification of signals produced by a current biased magnetoresistive sensor |
| 04/18/1990 | EP0364355A2 Spindle servo control for electronic still camera |
| 04/18/1990 | EP0364222A2 Apparatus for reducing computer system power consumption |
| 04/18/1990 | EP0364176A2 System and method for formatting high density storage media |
| 04/18/1990 | CN1041471A Connectorless hermetic optical disk system |
| 04/17/1990 | US4918743 Circuit for generating a dual purpose control signal in a disk apparatus |
| 04/17/1990 | US4918678 Disc reproducing system for compensating mechanical imperfections |
| 04/17/1990 | US4918544 Multi-spindle synchronization control system for magnetic disk apparatus |
| 04/17/1990 | CA1267974A1 Optical information recording and reproducing apparatus |
| 04/12/1990 | DE3932627A1 Optical disc recording and playback unit - has laser controlled by detector circuit to limit amount of light within period |
| 04/11/1990 | CN1041235A Optical disk reproducing device and optical disk reproducing method and composite recording medium |
| 04/11/1990 | CN1007559B Record carrier and apparatus for mfg. the same |
| 04/10/1990 | US4916687 Apparatus for mounting and rotating an optical card for recording and/or reproducing information |
| 04/10/1990 | US4916685 Determination of the total time required for reproducing a desired range of signals recorded on a recording disk in a signal recording and reproduction system |
| 04/10/1990 | US4916684 Head drive arrangement for a data reproducing apparatus |
| 04/10/1990 | US4916683 Optical recording/reproducing apparatus with means to shift light beam periodically to prevent record medium deterioration |
| 04/10/1990 | US4916680 Magnetooptic recording member having selectively-reversed erasure directions in predetermined recording areas of the record member |
| 04/10/1990 | CA1267725A1 Optical information recording-reproducing apparatus and method |
| 04/05/1990 | WO1990003642A1 Connectorless hermetic optical disk system |
| 04/05/1990 | DE3933186A1 Elektronische einzelbildkamera Single electronic imaging camera |
| 04/04/1990 | EP0361944A1 Recorded data reading system |
| 04/04/1990 | EP0361935A2 Information processing apparatus with means for outputting signal representing relative position between head and medium |
| 04/04/1990 | EP0361783A2 Disk file with symmetric housing |
| 04/04/1990 | EP0361781A2 Protective circuit for magnetoresistive element |
| 04/04/1990 | EP0361267A2 A rotation control circuit for a hall motor |
| 04/03/1990 | US4914647 Optical disc player |
| 04/03/1990 | US4914534 Information reproducing apparatus having a timer for restricting operation thereof and means for overriding said timer when the information reproducing apparatus is operatively coupled to a reproduced information handling apparatus |
| 04/03/1990 | US4914532 Method of efficiently erasing data in accordance with type of magnetic recording medium and apparatus for realizing the same |
| 04/03/1990 | US4914528 Detection of a synchronizing signal in a magnetic recording/reproducing apparatus |
| 04/03/1990 | US4914523 Optical disk apparatus compatible with different television system standards |
| 04/03/1990 | US4914421 Detector for disc records |
| 04/03/1990 | US4914398 Method and circuitry to suppress additive disturbances in data channels containing MR sensors |
| 04/03/1990 | US4914369 Disc drive with improved storage capacity |
| 04/03/1990 | US4914279 Card reading apparatus having a passive electrical speed controller |
| 04/03/1990 | US4913984 Opening/closing device for battery cover |
| 03/28/1990 | EP0360123A2 Super-large capacity data storage drive |
| 03/27/1990 | US4912697 Apparatus and method for preventing recording errors due to a reduction in the relative speed between an information carrying light beam and a recording medium |