| Patents for G11B 21 - Head arrangements not specific to the method of recording or reproducing (20,963) |
|---|
| 12/13/1989 | EP0345352A1 Track-jump device for a disc device |
| 12/13/1989 | EP0248859B1 Process for searching for a track on a rotating plate-like information support and circuit for performing the process |
| 12/13/1989 | EP0214200B1 Circuit for an audio and/or video disk playback 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 |
| 12/12/1989 | US4887173 Storage apparatus including head drive control |
| 12/12/1989 | CA1263892A1 Motor with "split" back-magnet array |
| 12/06/1989 | EP0344958A1 Head driving circuit |
| 12/06/1989 | EP0344759A2 High track density media with optical servo tracks and method and apparatus for inscribing the tracks on the media |
| 12/05/1989 | US4885516 Techniques for disk servo track following |
| 12/05/1989 | CA1263750A1 Preformatted information medium and optical reader device |
| 11/29/1989 | EP0343332A1 Magnetic disc driving apparatus |
| 11/29/1989 | EP0215867B1 Circuit arrangement for a playback device for audio or video discs |
| 11/28/1989 | US4884155 Self-loading head assembly for disk drives |
| 11/28/1989 | US4884154 Flanged transducer supporting arm for a magnetic head/arm assembly |
| 11/28/1989 | US4884152 Method for restoring track 0 |
| 11/23/1989 | EP0342973A2 Position control system for disk storage drive system |
| 11/21/1989 | US4882719 Disk playing method for disk player |
| 11/21/1989 | CA1263182A1 Magnetic head supporting device |
| 11/16/1989 | WO1989011148A2 Tape drive machines |
| 11/15/1989 | EP0341362A2 Magnetic disc apparatus |
| 11/14/1989 | US4881142 Magnetic disc unit employing temperature compensation |
| 11/14/1989 | US4881140 Integrated disc drive and actuators support |
| 11/14/1989 | US4881139 Latch mechanism for rotary actuator and the like |
| 11/09/1989 | DE3814091A1 Circular arrangement for driving a positioning coil of a rotary data store |
| 11/07/1989 | US4879705 Automatic loading disc player |
| 11/07/1989 | US4879618 Wind breaking assembly for a magnetic head |
| 11/07/1989 | US4879617 Actuator assembly for hard disk drives |
| 11/07/1989 | US4879612 Head positioning servo-mechanism with error reduction capabilities |
| 11/02/1989 | WO1989010614A1 Optical disk and movement control of its optical spot |
| 11/02/1989 | EP0339724A1 Device for recording digital information signal |
| 11/01/1989 | CN1036853A Linear read write device and magnetic disk apparatus |
| 10/31/1989 | US4878136 Track crossing detector |
| 10/31/1989 | US4878135 Method and system for a magnetic disk drive employing a quadratic compensation function for determining an offset correction value |
| 10/25/1989 | EP0338858A2 Optical disk apparatus with shortened access time and rotated method |
| 10/25/1989 | EP0338698A2 A transducer head suspension assembly |
| 10/24/1989 | US4876679 Digitally controlled positioning system for quickly moving and then finely positioning an object |
| 10/24/1989 | US4876623 Magnetic disc device with gimbal spring having variable elastic characteristics |
| 10/24/1989 | US4876618 Method for detecting zero track |
| 10/19/1989 | WO1989009987A1 Magnetic recording device using circumferentially offset heads with double sided media |
| 10/18/1989 | CN1036474A Senser feed movement divece of reproducing apparaturs for disk recording carriers |
| 10/17/1989 | US4875202 Disk-type storage medium recording/reproducing apparatus |
| 10/17/1989 | US4875122 Head transport assembly having simplified mutually independent positional adjustments |
| 10/17/1989 | US4875121 Magnetic head supporting device |
| 10/17/1989 | US4875120 Head driving apparatus with coarse and fine adjustments |
| 10/17/1989 | US4875116 Transducer position control system for data transfer apparatus employing disklike record media |
| 10/17/1989 | US4875114 System for detecting a reference track on a disk surface in a disc storage unit |
| 10/12/1989 | DE3810438A1 Cylinder store for magnetic-optical or optical data storage and reproduction |
| 10/11/1989 | EP0336761A2 Position detecting device with means for switching a plurality of alternating signals having different phases |
| 10/11/1989 | EP0336419A2 Apparatus and method for optical servo control with media having information storage and servo control regions of different reflectivities |
| 10/11/1989 | EP0336037A2 Servo head control apparatus |
| 10/04/1989 | EP0335650A2 Sampled servo motion control system |
| 10/04/1989 | EP0335546A2 Off-set nulling system and method for computer disk drives |
| 10/04/1989 | EP0335517A2 Servo address system |
| 10/04/1989 | EP0335031A2 Lock mechanism for a head-arm mechanism of a disk drive |
| 10/03/1989 | US4872152 Light spot position control system and method by sampled servo |
| 10/03/1989 | US4872077 Recording and/or reproducing apparatus with adjustments for positioning head and a moving device using the same |
| 10/03/1989 | US4872074 Data transducer position control system for rotating disk data storage equipment |
| 10/03/1989 | CA1262186A1 Optical disc player with improved initial positioning operation |
| 09/27/1989 | EP0334650A2 Low profile head-load beam slider arm for disk drive |
| 09/27/1989 | EP0334487A2 Actuator assembly for a disk drive system and a process for making same |
| 09/26/1989 | US4870525 Method of mounting flexure arms on a cast rotary actuator |
| 09/26/1989 | US4870518 Removable cartridge disc drive with radial arm voice coil actuator |
| 09/26/1989 | CA1261965A1 Video signal recording apparatus |
| 09/26/1989 | CA1260137A1 Track jump servo system for disc players |
| 09/21/1989 | WO1989008917A1 Disc drive fine servo velocity control and method for head positioning relative to a disc |
| 09/21/1989 | WO1989008916A1 Head loading velocity control |
| 09/20/1989 | EP0333259A2 Electrodynamic actuator for optical recording system |
| 09/20/1989 | EP0333232A2 Circuit for searching track on an optical disc |
| 09/20/1989 | EP0333128A2 Linear access mechanism and magnetic disk apparatus |
| 09/20/1989 | EP0332689A1 Least squares method and apparatus for determining track eccentricity of a disk |
| 09/19/1989 | US4868819 Access control apparatus |
| 09/19/1989 | US4868696 Linear actuator using a compound parallel bendable element suspension system |
| 09/19/1989 | US4868695 Head/arm lock mechanism for a disk drive |
| 09/19/1989 | US4868692 Tracking error signal forming circuit |
| 09/19/1989 | US4868678 Apparatus for recording a video signal of consecutive fields on a pair of separated tracks |
| 09/19/1989 | US4866836 Method for mounting a magnetic head on a suspension arm |
| 09/19/1989 | CA1259697A1 Actuator arm bearing preload arrangement for a rotary disc drive |
| 09/19/1989 | CA1259696A1 Actuator arm assembly for a disk memory drive |
| 09/14/1989 | DE3906907A1 Record player with a fastening device for the signal pick-up |
| 09/13/1989 | EP0332200A2 Servo positioning apparatus |
| 09/13/1989 | EP0332058A1 Switching device for automatically retracting a data memory positioning device into a home position |
| 09/12/1989 | US4866695 Access control system for rotating an information storage disc at a constant linear velocity |
| 09/12/1989 | US4866686 Optical record carrier and apparatus for reading the record carrier |
| 09/12/1989 | US4866554 Automatic head retract system for disk drive |
| 09/12/1989 | US4866553 Magnetic disk apparatus having a structure suitable for measuring a minute flying weight |
| 09/12/1989 | US4866540 Reproduction method for a disk player |
| 09/12/1989 | CA1259404A1 Thermal isolation of the voice coil motor from base plate and carriage guide rails of a disc drive |
| 09/08/1989 | WO1989008313A1 Disk drive apparatus |
| 09/08/1989 | WO1989008307A1 Ceramic support arm for movably positioning transducers |
| 09/08/1989 | WO1989008306A1 Removable cartridge disc drive with radial arm voice coil actuator |
| 09/05/1989 | US4864447 Linear actuator for a memory storage apparatus |
| 09/05/1989 | US4864446 Mechanism for guiding head carriage |
| 09/05/1989 | US4864445 Head loading mechanism for recording and/or reproducing apparatus |
| 09/05/1989 | US4864444 Latch for high performance linear actuator for memory storage device |
| 09/05/1989 | US4864437 Head loading velocity control |
| 09/05/1989 | US4864434 Method for writing a tri-phase servo pattern which provides information for positioning the transducers of a magnetic storage device |
| 09/05/1989 | US4864170 Linear motor |
| 09/05/1989 | US4863039 Apparatus and method for handling a flexible disk for testing |
| 08/30/1989 | EP0329846A2 A method and apparatus for measuring dynamic track misregistration |