| Patents for G11B 21 - Head arrangements not specific to the method of recording or reproducing (20,963) |
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| 10/12/1993 | US5253131 Servo pattern for location and positioning of information on a disk drive |
| 10/07/1993 | DE4309376A1 Hard disc system magnetic head control appts. - has digital servo system to monitor if command is received to move heads to new position and to control move. |
| 10/07/1993 | DE4305835A1 Controlling heads of hard disc drive system by writing in guide pattern - generating signals from disc for evaluation to provide control signals for centring head on track |
| 10/07/1993 | DE4211285A1 Automatically correcting head position w.r.t. disc - coupling regulating device to processor using corrections based upon data characteristic and values in memory |
| 10/06/1993 | EP0563270A1 Rigid disk drive with dynamic head loading apparatus |
| 10/06/1993 | EP0563267A1 Rotary inertial latch for disk drive actuator |
| 10/06/1993 | EP0563230A1 Miniature hard disk drive for portable computer |
| 10/05/1993 | US5251201 Capable of accessing data recorded on both sides of an optical disk |
| 10/05/1993 | US5251200 Tracking method for memory apparatus |
| 10/05/1993 | US5251082 Miniaturized disk file pluggable into a card terminal |
| 10/05/1993 | CA1322789C Single stage seek method |
| 09/30/1993 | WO1993019460A1 Carriage retention device for disk drives |
| 09/29/1993 | EP0562994A2 Method and apparatus for cleaning disks |
| 09/29/1993 | EP0562758A2 Position identification and error handling in data recording disk file |
| 09/29/1993 | EP0562563A2 Multi-track embedded servo recording format and method |
| 09/28/1993 | US5249213 Circuit for counting the number of crossed over tracks by an optical head in optical disk apparatus |
| 09/28/1993 | US5249169 Apparatus for reproducing information |
| 09/28/1993 | US5249168 Method and apparatus for initializing optical disk drive apparatus |
| 09/28/1993 | US5248990 Process for producing optical recording medium for optical data recording and reproduction |
| 09/28/1993 | CA1322596C Seeking multitasking disk controller |
| 09/24/1993 | CA2070969A1 Multi-track embedded servo recording format and method |
| 09/21/1993 | US5247498 Optical disk drive apparatus and a seek method spiral track |
| 09/21/1993 | US5247410 Magnetic disk apparatus using a rotary actuator for magnetic head positioning with reduced vibration |
| 09/16/1993 | WO1993018507A1 Removable cartridge disk drive for receiving a cartridge housing a 105mb 3.5 inch hard disk |
| 09/15/1993 | EP0560282A2 Servo system for providing increased recording density and improved operation of the AGC circuitry |
| 09/15/1993 | EP0560251A2 Stepper motor with vernier control mode |
| 09/15/1993 | EP0560167A1 Active magnetic latch for disk drive and method |
| 09/15/1993 | EP0559731A1 Improved magnetic head suspension |
| 09/14/1993 | US5245597 Method and device for correcting track deviation in optical disc drive |
| 09/14/1993 | US5245594 Data read/write system for a disc storage unit |
| 09/14/1993 | US5245490 Disc recording and/or reproducing apparatus including a head positioning mechanism having a spiral cam for positioning a head at a reference position |
| 09/14/1993 | US5245232 Linear actuator |
| 09/14/1993 | CA1322244C Data storage apparatus using optical servo tracks |
| 09/08/1993 | EP0559494A2 Crosstalk detecting apparatus |
| 09/08/1993 | EP0559493A2 Crosstalk detecting apparatus |
| 09/08/1993 | EP0558983A1 Tripad air bearing magnetic head slider |
| 09/08/1993 | EP0532609A4 Two and one half inch diameter multiple disk drive |
| 09/07/1993 | US5243591 Protecting a read/write head from damage |
| 09/07/1993 | CA1322050C Magnetic disc unit |
| 09/02/1993 | WO1993017428A1 Disk reproducing apparatus |
| 09/02/1993 | DE4305831A1 Magnetic head assembly with spring arms for head mounting - has pair of arms fixed to carrier by clamping elements secured by forming operation causing deformation at point of contact |
| 09/01/1993 | EP0558355A2 Compact, high-speed, rotary actuator |
| 09/01/1993 | EP0558202A1 Magnetic head slider fabrication |
| 09/01/1993 | EP0557710A2 Head suspension assembly for a disk drive |
| 09/01/1993 | EP0557583A1 Head suspension assembly for a disk drive |
| 08/31/1993 | US5241522 Optical disk apparatus using transition control between positioner seek control and lens seek control |
| 08/31/1993 | CA1321831C Self-loading head assembly for disk drives |
| 08/25/1993 | EP0556445A1 Peak detector for magnetic disc drive track following |
| 08/25/1993 | EP0556302A1 Multiple actuator disk drive |
| 08/24/1993 | US5239526 Data recording/reproducing apparatus of spiral trade system with kick back control |
| 08/24/1993 | US5239431 Head lift limiter for a disk drive |
| 08/18/1993 | EP0555969A1 Directly welded load beam flexure assembly |
| 08/18/1993 | EP0555865A2 A servo tracking circuit for an optical disk apparatus |
| 08/17/1993 | US5237529 Microstructure array and activation system therefor |
| 08/17/1993 | US5237474 Head cartridge apparatus having head supporting arm partially inserted into disk case through window formed therein |
| 08/17/1993 | US5237472 Rigid disk drive with dynamic head loading apparatus |
| 08/17/1993 | CA1321423C Head loading velocity control |
| 08/17/1993 | CA1321422C Sampled servo code format and system for a disc drive |
| 08/10/1993 | US5235580 Optical information recording-reproducing apparatus provided with a plurality of sample hold circuits |
| 08/10/1993 | US5235576 Optical disc apparatus |
| 08/10/1993 | US5235484 Low profile magnetic transducer assembly with negative pressure slider |
| 08/10/1993 | US5235478 Disc drive apparatus with servo tracks offset from data tracks |
| 08/05/1993 | WO1993015593A1 Carrier strip head interconnect assembly |
| 08/05/1993 | WO1993015505A1 Magnetic disk apparatus with improved positioning control of magnetic head |
| 08/05/1993 | DE4218420A1 Recording and reproducing method for concentric or parallel track computer disc - using multiple heads in radial carriers permanently positioned above tracks |
| 08/04/1993 | EP0554125A2 Positioning control system |
| 08/04/1993 | EP0554065A2 Disc recording and/or reproducing apparatus |
| 08/04/1993 | EP0553730A2 Digital recording and reproducing apparatus |
| 08/04/1993 | EP0548290A4 Improved reverse rail head suspension |
| 08/03/1993 | US5233588 Disk reproduction apparatus and method for searching thereof |
| 08/03/1993 | US5233487 Functional measurement of data head misregistration |
| 07/27/1993 | US5231615 Carriage fixing apparatus and disk driver having such carriage fixing apparatus |
| 07/27/1993 | US5231557 Magnetic disk apparatus having rotary type actuator and a height reducing return spring |
| 07/27/1993 | US5231556 Self-holding latch assembly |
| 07/27/1993 | US5231549 Disk drive apparatus with cam and follower for unloading heads |
| 07/22/1993 | WO1993014495A1 Magnetic head assembly, its manufacture, and magnetic disc device |
| 07/21/1993 | EP0551743A1 Data storage system |
| 07/20/1993 | US5229896 Disk drive and method of controlling the same |
| 07/20/1993 | US5229891 Tracking control system using single frequency pilot signal |
| 07/20/1993 | CA1320568C Tracking error signal forming circuit |
| 07/14/1993 | EP0550978A1 Miniature hard disc drive system |
| 07/13/1993 | US5227935 Tape drive having a selectively retractable drive hub |
| 07/13/1993 | US5227929 Portable computer hard disk protective reflex system |
| 07/13/1993 | US5227625 Retro-reflective variable-pitch diffraction grating for use in a rotary actuator disk file |
| 07/08/1993 | WO1993013524A1 A disk recording system and a method of controlling the rotation of a turntable in such a disk recording system |
| 07/08/1993 | WO1993013225A1 Htlv-1 probes for use in solution phase sandwich hybridization assays |
| 07/08/1993 | CA2125144A1 Htlv-1 probes for use in solution phase sandwich hybridization assays |
| 07/07/1993 | EP0550302A2 Track retrieval system for optical disk |
| 07/07/1993 | EP0550220A2 Disk drive |
| 07/07/1993 | EP0549814A1 Mechanism for finely moving head |
| 07/07/1993 | EP0346439B1 Low drag stabilizer device for stabilizing the interface between a transducer and a moving medium |
| 07/07/1993 | CN1074058A Tribo-attractive contact slider for an optical read/write system |
| 07/07/1993 | CN1074056A Tribo-attractive contact data storage system |
| 07/06/1993 | US5226029 Electric charge image recording medium and recording/reproducing apparatus |
| 07/06/1993 | US5225949 Disk drive transducer suspension assembly of reduced thickness |
| 07/06/1993 | CA1319980C Disc drive fine servo velocity control and method for head positioning relative to a disc |
| 06/30/1993 | EP0549237A2 Optical disk storage system and head apparatus therefor |
| 06/30/1993 | EP0549236A2 Optical disk storage system and head apparatus therefor |
| 06/30/1993 | EP0548290A1 Improved reverse rail head suspension |
| 06/29/1993 | US5224000 Crash stop and magnetic latch for a voice coil actuator |