| Patents for G11B 21 - Head arrangements not specific to the method of recording or reproducing (20,963) |
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| 10/09/1991 | EP0450184A2 Aerodynamically releasable lock for a disk file actuator assembly |
| 10/08/1991 | US5056074 Tracking servo system with a variable equalizing characteristic |
| 10/08/1991 | US5056072 Seek apparatus for optical disc drive |
| 10/08/1991 | US5055952 Automatic track finding (ATF) controller for digital audio tape recorder |
| 10/08/1991 | US5055951 Method and apparatus for servo-positioning movable transducer heads |
| 10/06/1991 | CA2031256A1 Disc drive slider lifter using shape memory metals |
| 10/02/1991 | EP0449535A2 Core slider for rigid magnetic disc drive, and method of producing the same |
| 10/02/1991 | EP0449314A2 Disc drive device |
| 10/01/1991 | US5053995 Tunnel current data storage apparatus having separate lever bodies |
| 10/01/1991 | US5053904 Hard disk driving device having a plurality of head sliders with equalized flotation height |
| 10/01/1991 | US5053897 Head position controlling circuit for disk unit including servo head selection |
| 10/01/1991 | US5052099 Polycrystalline ceramic; surface roughness |
| 10/01/1991 | CA1290054C Method and apparatus for controlling the flying height of the head in a magnetic storage unit |
| 09/25/1991 | EP0448338A2 A rotary actuator head positioning apparatus and dual pivot apparatus for a disk drive |
| 09/25/1991 | EP0448216A2 Disk drive with zero skew rotary actuator system |
| 09/24/1991 | US5051972 Track accessing control apparatus having a high-pass filter for extracting a tracking signal |
| 09/24/1991 | US5051855 Rotary actuator |
| 09/24/1991 | US5051854 Magnetic head device |
| 09/24/1991 | US5051851 Method and apparatus for positioning head on the basis of premeasured amount of displacement |
| 09/24/1991 | US5051849 Recording apparatus including a pre-recording positioning function |
| 09/24/1991 | US5051669 Voice coil motor |
| 09/18/1991 | EP0447081A1 Method of recording servo information |
| 09/17/1991 | US5050157 Friction reducing piezoelectric feed guide mechanism |
| 09/17/1991 | US5050149 Servo device for disc player |
| 09/17/1991 | US5050146 Track seek recovery system and method |
| 09/17/1991 | US5050016 Disk drive servo system using gain limited high-frequency track-following compensator |
| 09/17/1991 | US5050015 Method and arrangement for reducing wear in a magnetic storage means |
| 09/17/1991 | US5050014 Magnetic recording apparatus for correcting the absolute track position |
| 09/17/1991 | CA1289180C Side-vented magnetic head air bearing slider |
| 09/11/1991 | EP0445226A1 Magnetic encoding apparatus and method |
| 09/10/1991 | US5048001 Load correction method for an information retrieval apparatus |
| 09/10/1991 | US5047999 Optical record carrier reader calculating track pitch and write velocity for locating read point |
| 09/10/1991 | US5047880 Magnetic disk pack with a servo recording surface |
| 09/04/1991 | EP0444062A1 Magnetic parking device for disk drive. |
| 09/03/1991 | US5046062 Movable body driving apparatus |
| 09/03/1991 | US5046060 Servo error controls |
| 09/03/1991 | US5046058 Track access apparatus having a learning control for positioning a transducer for a disc-shaped recording mechanism |
| 08/28/1991 | EP0443847A2 Information recording/reproducing apparatus |
| 08/28/1991 | EP0443553A2 Apparatus and method for recognizing head position information |
| 08/28/1991 | EP0443042A1 Method and apparatus for seek control of disk apparatus |
| 08/27/1991 | US5043961 Transducer access control system |
| 08/27/1991 | US5043834 Actuator locking system of disk unit |
| 08/27/1991 | US5043833 Magnetic head assembly |
| 08/27/1991 | US5043577 Distance-controlled tunneling transducer |
| 08/22/1991 | WO1991012668A1 Process for converting an analog voltage to a digital value |
| 08/22/1991 | DE4005037A1 Analogue=digital voltage converter - uses binary values representing results of successive comparisons with respective reference voltages |
| 08/21/1991 | EP0442712A2 Optical information recording and/or reproducing apparatus |
| 08/21/1991 | EP0442660A2 Air bearing surface of head core slider, and method of manufacturing it |
| 08/21/1991 | EP0442650A2 Disk file with adaptive correction for nonrepeatable disk runout |
| 08/21/1991 | EP0442566A1 Information recording device |
| 08/21/1991 | EP0442225A2 Head/gimbal assembly having low stiffness cross band flexure |
| 08/21/1991 | EP0441969A1 Seek circuit of optical disk |
| 08/20/1991 | US5042019 Method of and apparatus for seeking a desired track by counting track crossing signals which are detected within a predetermined time interval |
| 08/20/1991 | US5041927 Magnetic disc driving apparatus having speed and position control |
| 08/20/1991 | US5041926 Track position syncopation cancellation in a disk drive |
| 08/17/1991 | CA2033700A1 Head/gimbal assembly having low stiffness cross band flexure |
| 08/14/1991 | EP0441561A2 Apparatus for generating magnetic field varying in response to an information signal |
| 08/14/1991 | EP0441407A1 System for positioning an object |
| 08/10/1991 | CA2036024A1 System for positioning a transducer |
| 08/07/1991 | EP0440440A2 Disk driving apparatus |
| 08/06/1991 | US5038333 Positioning systems including reliable track crossing detection for high speed relative motions |
| 08/06/1991 | US5038233 Track position detecting mechanism |
| 07/31/1991 | EP0439278A2 Method and apparatus for recording data transitions |
| 07/31/1991 | EP0438806A2 Head suspension connection assembly |
| 07/31/1991 | CN1053507A Disk file or tape drive with high serro sample rate |
| 07/31/1991 | CN1053506A Sectored servo independent of data architecture |
| 07/30/1991 | US5036506 Record carrier scanning apparatus with feedback control system for controlling scanning point position and velocity |
| 07/30/1991 | US5036490 Memory device with dual cantilever means |
| 07/30/1991 | US5036416 Aerodynamically releasable lock for a disk file actuator assembly |
| 07/25/1991 | WO1991010991A1 Process and circuit arrangement for adjusting the access arm of a disk operating system |
| 07/24/1991 | EP0438305A2 Data recording medium and data recording and reproducing apparatus |
| 07/24/1991 | EP0438054A2 Method and apparatus for controlling a small spacing between a magnetic head and a magnetic recording medium |
| 07/24/1991 | EP0437947A2 Writing servo patterns in a DASD device |
| 07/24/1991 | EP0437891A1 Read and/or write device |
| 07/23/1991 | US5034837 Magnetic disk drive incorporating a magnetic actuator lock and a very small form factor |
| 07/23/1991 | US5034746 Analog-to-digital converter for computer disk file servo position error signal |
| 07/23/1991 | CA1286768C "delta" magnetic head-slider |
| 07/17/1991 | CN1053162A Magnetic recording/reproducing apparatus |
| 07/16/1991 | US5033039 Positioning system for flexure mounted read/write head |
| 07/16/1991 | US5032776 Attenuation filter |
| 07/10/1991 | CN1013157B Linear read write device and magnetic disk apparatus |
| 07/03/1991 | EP0435697A1 Magneto-optical recording/reproducing device |
| 07/03/1991 | EP0435646A2 Target track position retrieval device |
| 07/03/1991 | EP0435495A2 Information recording apparatus with a non-Newtonian liquid bearing |
| 07/03/1991 | EP0435422A2 Information-recorded disk carrying tracking pilot signal and playing apparatus therefor |
| 07/03/1991 | EP0434688A1 Seeking multitasking disk controller |
| 07/03/1991 | EP0434687A1 Rotating positioning device for magnetic disk memories |
| 07/02/1991 | US5029157 Disk player having a pickup securing device |
| 07/02/1991 | US5029030 Rotary actuator system with zero skew angle variation |
| 07/02/1991 | US5029029 Linear actuator with reduced wear guide way |
| 06/26/1991 | EP0434261A1 Apparatus for supporting a conductor sleeve in a head gimbal assembly |
| 06/26/1991 | CN1052567A 磁盘记录系统 Disk recording system |
| 06/25/1991 | US5027242 Magnetic disk apparatus having at least six magnetic disks |
| 06/25/1991 | US5027239 Routing a sleeve and conductors in a head-gimbal assembly |
| 06/25/1991 | US5027238 Floating type magnetic head with flexure cutout |
| 06/25/1991 | US5027234 System for detecting a reference track of a disc storage unit |
| 06/25/1991 | US5027233 Method for determining servo position data in a disk drive |
| 06/19/1991 | EP0433059A2 Disc drive apparatus with tracking servomechanism |
| 06/19/1991 | EP0433021A2 Floating type magnetic head device |
| 06/19/1991 | EP0432877A2 Rotary head actuator for a magnetic disk drive data storage device |