| 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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| 12/12/1989 | US4887175 Disc driving unit |
| 12/12/1989 | CA1263893A1 Optical memory with sampled tracking for a preformatted medium |
| 12/06/1989 | EP0344994A2 Optical disc drives |
| 12/05/1989 | US4885733 Method of, and system for, detecting an excessive loading condition of multiple disks in a video disk apparatus |
| 12/05/1989 | US4885644 Spindle servo device for data recording disk reproducing apparatus |
| 11/30/1989 | DE3816832A1 Process of the transmission of information stored in a CD(V) auxiliary channel |
| 11/29/1989 | EP0343982A2 Apparatus for recording and/or reproducing information |
| 11/28/1989 | CA1263476A1 Error control of sector address and optical disc |
| 11/23/1989 | EP0342748A1 Recording system as well as record carrier and recording apparatus for use in the system |
| 11/21/1989 | US4882720 Memory device including a rotating disk and means for detecting change in frictional resistance between the disk and a read/record head |
| 11/21/1989 | US4882671 Microprocessor controlled rigid disk file subsystem |
| 11/21/1989 | US4882643 Disc drive motor |
| 11/21/1989 | US4882639 Changeover writing circuit for magnetic disk apparatus operable at plural densities |
| 11/21/1989 | US4882511 Brushless three-phase D.C. motor |
| 11/15/1989 | EP0179154B1 Radially polarized multiple-stage ferrofluid seal apparatus |
| 11/14/1989 | US4881215 Optical recording medium and method for correcting angular deviation thereof |
| 11/14/1989 | US4881141 Driving apparatus for a magnetic head |
| 11/14/1989 | US4881140 Integrated disc drive and actuators support |
| 11/09/1989 | DE3814091A1 Circular arrangement for driving a positioning coil of a rotary data store |
| 11/07/1989 | US4879703 Magneto-optic memory apparatus with defect detection of recording medium during erasing operation |
| 11/07/1989 | US4879610 Protective circuit for a magnetoresistive element |
| 11/07/1989 | US4879608 Apparatus for generating index signals, for use in magnetic recording/reproducing apparatuses |
| 11/02/1989 | EP0339874A2 Thin film head read recovery |
| 11/02/1989 | EP0339765A2 Disk drive spindle motor |
| 10/31/1989 | US4878140 Magneto-resistive sensor with opposing currents for reading perpendicularly recorded media |
| 10/31/1989 | US4878139 Loading apparatus for a magnetic disk cartridge |
| 10/31/1989 | US4878129 Method for reproduction of stored video signals with disk reproducing apparatus |
| 10/19/1989 | DE3911389A1 Servosystem fuer einen motor Servo system for a motor |
| 10/19/1989 | DE3910859A1 Magnetic recording/reproducing process and apparatus with read-error correction function |
| 10/17/1989 | US4875114 System for detecting a reference track on a disk surface in a disc storage unit |
| 10/17/1989 | US4875108 Phase lock loop |
| 10/17/1989 | US4874993 Sensorless brushless motor |
| 10/17/1989 | US4874976 Spindle motor for driving discs |
| 10/10/1989 | US4873596 Magnetic disk drive apparatus |
| 10/05/1989 | DE3809398A1 Method of detecting the exchange of an exchangeable storage medium |
| 10/04/1989 | EP0335580A2 Phase and frequency locked motor control system and method of motor control |
| 10/03/1989 | US4872071 Method and apparatus for detecting abnormal operation of moving storage apparatus |
| 10/03/1989 | US4872068 Disk playing method resulting in reduced start-up time |
| 09/26/1989 | US4870703 Magnetic disc memory unit |
| 09/26/1989 | US4870643 Parallel drive array storage system |
| 09/26/1989 | US4870518 Removable cartridge disc drive with radial arm voice coil actuator |
| 09/26/1989 | US4870514 Disk drive circuit arrangement for the suppression of undesired index pulses |
| 09/26/1989 | CA1261466A1 Light control circuit of optical disc system |
| 09/26/1989 | CA1261061A1 Magnetic disk cartridge with erasure-preventing device |
| 09/21/1989 | WO1989008916A1 Head loading velocity control |
| 09/19/1989 | US4868806 An information recording apparatus for recording a directory information unit on a single recording track of a recording medium based on the number of directory information units previously recorded in the single recording track |
| 09/19/1989 | US4868805 Inspection apparatus |
| 09/19/1989 | US4868804 Optical memory system which uses a different illumination mode when scanning reserved areas |
| 09/19/1989 | US4868691 Recording or reproducing apparatus |
| 09/19/1989 | US4868678 Apparatus for recording a video signal of consecutive fields on a pair of separated tracks |
| 09/19/1989 | CA1259699A1 Optical memory card reader |
| 09/19/1989 | CA1259694A1 Pcm audio signal reproducing apparatus |
| 09/13/1989 | EP0332317A2 Shock load detection device |
| 09/13/1989 | EP0332171A2 Disc player |
| 09/13/1989 | EP0332099A2 Control circuit for spindle motor |
| 09/13/1989 | EP0332058A1 Switching device for automatically retracting a data memory positioning device into a home position |
| 09/13/1989 | EP0331839A2 Automatic loading disc player |
| 09/13/1989 | EP0331715A1 Automatic gain control system |
| 09/13/1989 | CN1035577A System for transferring information using information carrier |
| 09/13/1989 | CN1035575A Method of and apparatus for recording information signal |
| 09/12/1989 | US4866695 Access control system for rotating an information storage disc at a constant linear velocity |
| 09/12/1989 | US4866554 Automatic head retract system for disk drive |
| 09/12/1989 | US4866546 Recording and reproducing apparatus for disk-type recording media |
| 09/12/1989 | US4866541 Erasing of information signal from an optical disk |
| 09/12/1989 | CA1259406A1 Disc drive system having a plurality of large sized rigid magnetic discs driven by a directly coupled dc brushless motor |
| 09/12/1989 | CA1259403A1 Video apparatus operable in a quiescent state |
| 09/08/1989 | WO1989008313A1 Disk drive apparatus |
| 09/08/1989 | WO1989008306A1 Removable cartridge disc drive with radial arm voice coil actuator |
| 09/05/1989 | US4864623 Method of recognizing a control command in a system, and interactive system for carrying out the method |
| 09/05/1989 | US4864554 Method of and device for scanning a radiation-sensitive surface of a rotating carrier with a radiation beam |
| 09/05/1989 | US4864553 Apparatus for controlling rotation of a run length limited code modulated information recording medium |
| 09/05/1989 | US4864443 Disc clamping device |
| 09/05/1989 | US4864442 Magnetic read/write apparatus |
| 09/05/1989 | US4864437 Head loading velocity control |
| 09/05/1989 | US4864428 Disk player having variable spindle speed for continuous audio in fast and slow reproduction modes |
| 09/05/1989 | US4864114 Method of and apparatus for confiscating a data bearing card |
| 08/29/1989 | US4862447 Optical record carrier with surface layer extending to the center of a substantially circular information track structure therein |
| 08/29/1989 | US4862439 Recording device that identifies recordable areas of a disk record |
| 08/29/1989 | US4862411 Multiple copy data mechanism on synchronous disk drives |
| 08/29/1989 | US4862304 Composite magnetic head |
| 08/29/1989 | US4862298 Shock load detection device |
| 08/29/1989 | US4862294 Disc erasing apparatus for selective erasure of disc tracks |
| 08/29/1989 | US4862291 Scanning system in information reproducing apparatus |
| 08/29/1989 | US4862078 Circuit for detecting defects of a magnetic recording head |
| 08/29/1989 | CA1258909A1 Optical information recording medium and method for recording information on said medium and reproducing information therefrom |
| 08/23/1989 | EP0328828A2 Spindle servo unit for disk playing device |
| 08/22/1989 | US4860272 Erroneous track jump restoration apparatus for optical record disc player |
| 08/22/1989 | US4860128 Recordable data device having identification symbols formed thereon and cooperating data processing system having registering symbols |
| 08/22/1989 | US4860127 Magnetic disk cartridge with erasure-preventing device |
| 08/22/1989 | US4859922 System for controlling the operating mode of a controlled apparatus |
| 08/16/1989 | EP0328022A2 Interlocking braking and lock mechanisms for scanning apparatus of an information processing system |
| 08/16/1989 | EP0327638A1 Hydrodynamic bearing and a method for introducing lubricant into the bearing |
| 08/16/1989 | EP0111010B1 Optical disc reproducer |
| 08/15/1989 | US4858219 Optical information recording reproducing memory system with both power control and optical irradiation inhibiting circuit |
| 08/15/1989 | US4858046 Head feed device |
| 08/15/1989 | US4858045 Magnetic disk lock having braking apparatus |
| 08/15/1989 | US4858044 Disc drive spindle motor with low cogging torque |
| 08/15/1989 | US4858031 Recording apparatus and regenerating apparatus |
| 08/10/1989 | WO1989007313A1 Device for driving a floppy disc |
| 08/09/1989 | EP0327109A1 Motor stop control device |