| Patents for G11B 21 - Head arrangements not specific to the method of recording or reproducing (20,963) |
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| 02/22/1989 | EP0304299A2 An optical disc drive |
| 02/22/1989 | EP0304262A2 Head driving apparatus |
| 02/21/1989 | US4807219 Optical pickup feed unit of optical disk player |
| 02/21/1989 | US4807207 Tracking control device |
| 02/21/1989 | US4807074 Magnetoresistive head for magnetic disk |
| 02/21/1989 | US4807072 Head position control mechanism for a magnetic disk apparatus with head locking |
| 02/21/1989 | US4807070 Supporting structure for dual magnetic head |
| 02/21/1989 | US4807063 Head position control system with multiple servo areas staggered on various disks |
| 02/21/1989 | US4807062 Multiple force retract circuit for a magnetic disk drive |
| 02/15/1989 | EP0303377A1 Method of recording position information of last track recorded with data in directory area |
| 02/15/1989 | EP0303369A2 Address search method for use in a disk player system |
| 02/14/1989 | US4805055 For positioning read/write heads |
| 02/14/1989 | US4805050 Disk player information selecting apparatus |
| 02/09/1989 | WO1989001223A1 Track-jump device for a disc device |
| 02/08/1989 | EP0302683A2 A method of, and an apparatus for, controlling the position of a data transducer head |
| 02/08/1989 | EP0302615A1 A head suspension assembly for a magnetic record disk store |
| 02/08/1989 | EP0302138A1 Method of locating on a record disc a track, containing information, selected as target |
| 02/07/1989 | US4803676 Circuitry for an audio or video disk player |
| 02/07/1989 | US4803675 High speed, low power consumption pickup head position control device in an optical type disc reproducing device |
| 02/07/1989 | US4803578 Assembly for stably mounting magnetic head on carriage |
| 02/07/1989 | US4803572 Recording/reproducing method and apparatus of magnetic disk unit in which playback commences before the magnetic head is completely centered on the track |
| 02/01/1989 | EP0301737A2 A method of, and an apparatus for, retracting the head and braking the drive motor of a record disk file |
| 02/01/1989 | EP0301644A2 Track seeking using sampled information |
| 01/31/1989 | US4802042 Side-vented magnetic head air bearing slider |
| 01/31/1989 | US4802030 Head-tape alignment apparatus with a tape edge find operation |
| 01/26/1989 | WO1989000750A1 Magnetic recorder/player device with stationary recording medium |
| 01/24/1989 | US4800549 Method and apparatus for seeking target address with error check code |
| 01/24/1989 | US4800456 Magnetic disk device with component materials having improved silicon content |
| 01/24/1989 | US4800455 Magnetic disk drive having a magnetic-head with a head gap supported parallel to the moving direction of a magnetic-head positioning mechanism |
| 01/24/1989 | US4800452 Disk recording and reproducing head system having track seeking for faulty addresses |
| 01/24/1989 | US4800445 Videodisk player |
| 01/19/1989 | DE3822760A1 Head lift-off for a disk drive |
| 01/18/1989 | EP0299084A1 Circuitry and method for controlling positioning of a head in a data storage device |
| 01/17/1989 | US4799207 Apparatus and method for maintaining progression of recovery of recorded information |
| 01/17/1989 | US4799206 Tracking control apparatus for recording disc reproducing apparatus |
| 01/17/1989 | US4799205 Apparatus for causing a head to access a selected one of a plurality of tracks |
| 01/12/1989 | WO1989000295A1 Systems and methods for sensing position and movement |
| 01/11/1989 | EP0298475A1 Head positioning system having position error compensation |
| 01/10/1989 | US4797769 Disc driving device |
| 01/10/1989 | US4797757 Servo head positioner with pulse adjusting circuitry |
| 01/10/1989 | US4797754 Method for writing servo pattern in magnetic disk unit |
| 01/03/1989 | US4796249 System to ascertain the scanning speed of audio disks with contactless scanning |
| 01/03/1989 | US4796246 Method and apparatus for beam-track alignment in optical disk apparatus |
| 01/03/1989 | US4796131 Head positioner preloaded stop |
| 01/03/1989 | US4796130 Carriage lock mechanism of a magnetic recording/reproduction apparatus |
| 01/03/1989 | US4796129 Magnetic head device for improving head placement on a magnetic disc |
| 01/03/1989 | US4796126 Magnetic head flying slider assembly |
| 01/03/1989 | US4796124 Information recording and reproducing apparatus |
| 01/03/1989 | US4796121 Temperature-compensated head positioning device for magnetic disc store |
| 01/03/1989 | US4796118 Welded leaf spring mounting for magnetic head assembly of disk drive apparatus |
| 01/03/1989 | US4796113 Method and apparatus for automatically replacing defective recording tracks in data storage apparatus |
| 01/03/1989 | US4796112 Actuator access control system for a magnetic head using trapezoidal drive current |
| 01/03/1989 | US4795981 Method for monitoring the performance of the head-disk-interface and device for preventing data losses due to magnetic head-disk-interferences |
| 01/03/1989 | US4795928 Linear actuator assembly for accessing a magnetic memory disc |
| 12/27/1988 | US4794586 Rotary access arm for optical disks |
| 12/27/1988 | US4794579 Circuit for remote-scanning audio or video disk player for contactless scanning with coarse and fine drive mechanisms for radial servo readjustment |
| 12/27/1988 | US4794469 Recorded data reproducing apparatus |
| 12/27/1988 | US4794287 Linear motor |
| 12/21/1988 | EP0295979A1 Method for writing information on a magnetic recording medium |
| 12/20/1988 | US4792875 Gimbal spring for floating type magnetic head |
| 12/20/1988 | US4792870 Method and apparatus for track accessing using a predicted state vector |
| 12/20/1988 | US4792861 Video signal recording apparatus with track centering using crosstalk detection and third odd multiple field recording |
| 12/20/1988 | US4792707 Disk tracking device |
| 12/20/1988 | US4792245 Bearing device |
| 12/14/1988 | EP0295015A2 Track access control system for magnetic disk apparatus |
| 12/14/1988 | EP0294761A1 Method of, and apparatus for, avoiding a magnetic transducer crash |
| 12/14/1988 | EP0294545A2 Head positioning device for optical disk drive |
| 12/13/1988 | US4791502 Apparatus for positioning a reading-recording head on a disc |
| 12/13/1988 | CA1246736A1 Method and apparatus to improve the positioning accuracy of a tracking arm |
| 12/13/1988 | CA1246464A1 Constant pressure device |
| 12/07/1988 | EP0293809A2 Method and apparatus for controlling the positioning of a head in a recording/reproducing apparatus |
| 12/06/1988 | US4789909 Method and apparatus for placing servo information at predetermined locations on a disc |
| 12/06/1988 | CA1246216A1 Arch flexure for winchester sliders |
| 12/06/1988 | CA1246215A1 Air bearing slider design |
| 12/06/1988 | CA1246214A1 Moving magnet disc drive actuator |
| 12/01/1988 | WO1988009552A1 Latch mechanism for disk drives |
| 12/01/1988 | WO1988009551A1 Disk drive architecture |
| 11/29/1988 | US4788671 Information recording and reproducing apparatus for effecting simultaneous recording and reproduction but at different rates |
| 11/22/1988 | US4787001 Magnetic disc apparatus |
| 11/22/1988 | US4787000 Head lifter for disk drive |
| 11/22/1988 | US4786999 Transducer suspension mount apparatus |
| 11/22/1988 | US4786995 Automatic head retract system for disk drive |
| 11/22/1988 | US4786994 Method of and apparatus for controlling the displacement of a movable system driven by an electric motor |
| 11/22/1988 | US4786990 Servo gain compensation in a disc drive |
| 11/22/1988 | US4786849 Offset compensating circuit in fine control servo device |
| 11/22/1988 | US4786836 Piezoelectric motor |
| 11/22/1988 | CA1245051A1 Calibration standards for flying height testers |
| 11/15/1988 | US4785360 Recording and reproducing apparatus having tracking control responsive to erase head scanning |
| 11/09/1988 | EP0290024A2 An access method of an optical disk drive by means of multi-track jump and a circuit therefor |
| 11/08/1988 | US4783709 Magnetic head supporting mechanism for tape recorder |
| 11/08/1988 | US4783708 Guide mechanism incorporating a cylindrical bearing |
| 11/08/1988 | US4783706 Circuit arrangement and method for saving power in magnetic disk apparatus without head displacement |
| 11/02/1988 | EP0289309A2 An apparatus for reading an optical disk |
| 11/02/1988 | EP0289143A2 Optical disk drive apparatus |
| 11/02/1988 | EP0289135A1 Bi-compliant rotor stepper motor for an actuator in disc drives |
| 11/01/1988 | US4782406 Data transfer apparatus with a disklike record medium and a method of operation therefore |
| 11/01/1988 | US4782404 Positioning system for a disc drive using a stepper motor |
| 10/27/1988 | EP0245303A4 Detection and amplification circuit. |
| 10/26/1988 | EP0288289A2 Optical disc reading apparatus |
| 10/25/1988 | US4780778 Device for adjusting a sensor at a reference position corresponding to a reference track position of a read/write head |