| Patents for G11B 21 - Head arrangements not specific to the method of recording or reproducing (20,963) |
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| 01/26/1988 | CA1232065A1 Method and apparatus for positioning transducers by digital conversion of analog-type signals |
| 01/19/1988 | US4720756 Apparatus for the positioning of objects having a low mass and a method of assembly thereof |
| 01/19/1988 | US4720754 Digitally responsive system for positioning a transducer of a storage apparatus |
| 01/19/1988 | US4719692 Method of manufacturing a magnetic head assembly |
| 01/12/1988 | CA1231443A1 Vertically loading head module for magnetic disk drive |
| 01/07/1988 | EP0251762A2 Servo gain compensation in a disc drive |
| 01/07/1988 | EP0251601A2 Optical data recording/reproducing apparatus |
| 01/07/1988 | EP0250763A1 Differental summing amplifier for inputs having large common mode signals |
| 01/05/1988 | US4718051 Optical beam tracking system for use in optical information recording and/or reproducing apparatus |
| 01/05/1988 | US4718050 Optical scanner and reader for information contained in light reflected from moving optical records |
| 01/05/1988 | US4717978 Screw shaft adjustment means for a magnetic disk drive unit |
| 01/05/1988 | US4716776 Rotary to linear converter with lead screw |
| 01/05/1988 | CA1231173A1 Helical band drive for disc storage apparatus |
| 12/29/1987 | US4716558 Record disc addressing apparatus |
| 12/29/1987 | US4716557 Apparatus for information retrieval from an optically readable storage disc |
| 12/29/1987 | US4716482 Head actuator limit stop assembly for a disk memory drive |
| 12/29/1987 | US4716481 Recording and/or reproducing apparatus having an imposed head shifting feature |
| 12/29/1987 | US4716480 Carriage latch for a disc drive |
| 12/29/1987 | US4716479 Magnetic disk head opening mechanism with an expanded opening range |
| 12/29/1987 | US4716478 Two point attachment with single point clamping for connecting the arm stack to the actuator member in a disc memory drive |
| 12/23/1987 | EP0250138A1 Servo system for a hard disk drive |
| 12/23/1987 | EP0249995A1 Head positioning system for floppy disk drives |
| 12/23/1987 | EP0249653A2 Reading device for the optical scanning of information recorded on a moving disc-shaped carrier |
| 12/22/1987 | US4714971 Method and apparatus for reproducing signals having improved rotary head tracking control |
| 12/22/1987 | US4714970 Reproducing apparatus having recording speed discriminating system |
| 12/22/1987 | US4714866 Rate-of-change signal generator using sampling techniques |
| 12/16/1987 | EP0249458A2 Method of accessing data recorded on a disk at a high speed |
| 12/16/1987 | EP0249062A2 Disk drive actuator velocity limiting circuit |
| 12/16/1987 | EP0249020A2 Adaptative control technique for a dynamic system |
| 12/15/1987 | US4713707 Tracking mount for a contactless recording and/or reproducing head |
| 12/15/1987 | US4713706 Device for mounting magnetic head |
| 12/15/1987 | US4713703 Information recording and reproducing apparatus |
| 12/09/1987 | EP0248536A2 Methods of and apparatus for seeking a target address on a record medium |
| 12/09/1987 | EP0248444A2 Tracking servo system for an information recording disc player |
| 12/09/1987 | EP0248092A1 Method for monitoring the performance of the head-disc-interface and device for preventing data losses due to magnetic head-disc-interferences |
| 12/08/1987 | CA1230177A1 Head moving apparatus using stepping motor |
| 12/02/1987 | EP0247453A2 Magnetic disk drive apparatus or system |
| 12/02/1987 | EP0247339A2 Servo gain compensation in a disc drive |
| 12/02/1987 | EP0247219A1 Direct access storage unit |
| 12/02/1987 | EP0247068A1 Disk drive control system |
| 12/01/1987 | US4710909 Phase compensation apparatus for an optical information recording and reproducing system |
| 12/01/1987 | US4710836 Magnetic head |
| 12/01/1987 | US4710835 Magnetic head driving mechanism for tape player |
| 12/01/1987 | US4710834 Apparatus for positioning a magnetic disk read head with pulse operated detent magnet |
| 12/01/1987 | US4710833 Floppy disk r/w head assembly |
| 12/01/1987 | US4710832 Tracking system for rotary magnetic recording medium using weighted sampled track values |
| 12/01/1987 | US4710831 Loading and unloading system for flexible disc drive apparatus |
| 12/01/1987 | US4710687 Seek operation control apparatus |
| 11/26/1987 | DE3716778A1 Fixed magnetic-disc device |
| 11/25/1987 | EP0246705A1 Methods of and apparatus for recording an information signal |
| 11/25/1987 | EP0246375A1 Head/arm assembly and rotary access mechanism for a disk file |
| 11/24/1987 | US4709285 Head assemblies mounted for optimum contact with a flexible magnetic disk |
| 11/24/1987 | US4709175 Linear pulse motor |
| 11/24/1987 | US4709174 Magnetic pole pieces for using in linear pulse motor |
| 11/19/1987 | EP0245303A1 Detection and amplification circuit |
| 11/17/1987 | US4707817 Method of generating tracking servo signal for optical disc playback apparatus |
| 11/17/1987 | US4707753 Disk drive head access mechanism |
| 11/17/1987 | US4707733 Information signal recording disc comprising a connected region formed between parallel program recorded and single program recorded regions, and reproducing apparatus therefor |
| 11/17/1987 | CA1229409A1 Flexible disk drive optimized for automated manufacture |
| 11/11/1987 | EP0244980A2 Rate-of-change signal generator and method using sampling techniques |
| 11/10/1987 | US4706234 Head feed control apparatus |
| 11/10/1987 | US4706142 Magnetic disk apparatus |
| 11/04/1987 | EP0243973A2 Compact disk drive |
| 11/04/1987 | EP0243821A2 A servo control system for a data recording disk file |
| 11/04/1987 | EP0243729A2 Method and apparatus for eliminating apparent offset in the servo code in a magnetic disc drive |
| 11/04/1987 | EP0243466A1 Apparatus and method for damping head positioners for disk drives. |
| 11/03/1987 | US4704646 Twist preventing mechanism for leaf hinge spring in a magnetic head assembly |
| 10/28/1987 | EP0242597A2 Micro mechanical actuation of a transducer head on a slider |
| 10/28/1987 | CN87102769A Optical record carrier and apparatus for reading record carrier |
| 10/27/1987 | US4703468 Optical disc tracking servo circuit having compensation for disc defects and external disturbances |
| 10/27/1987 | US4703377 Thermal compensation for disk drive carriage assembly |
| 10/27/1987 | US4703376 Apparatus for loading and retracting magnetic head in a disk drive |
| 10/27/1987 | US4703367 Recording disk data playback apparatus |
| 10/27/1987 | US4702101 Apparatus and method for testing the calibration of a hard disk substrate tester |
| 10/21/1987 | EP0241978A1 Optical record carrier and apparatus for reading the record carrier |
| 10/21/1987 | EP0241515A1 Transducer positioning mechanism |
| 10/20/1987 | US4701902 Automatic loading disc player |
| 10/20/1987 | US4701898 Method and apparatus for locating a selected track on a record disc |
| 10/20/1987 | CA1228421A1 Apparatus for reproducing information from a disc- shaped optically readable record carrier |
| 10/20/1987 | CA1228418A1 Disk file servo control system with fast reduction of repeatable head position error |
| 10/14/1987 | EP0240745A2 Disk drive servo techniques |
| 10/13/1987 | US4700251 Head carriage moving mechanism of disk recording reproducing device |
| 10/13/1987 | US4700250 Structure for fixing floating type magnetic head to gimbal spring |
| 10/13/1987 | US4700246 Disk drive with isolated voice coil motor magnet |
| 10/13/1987 | US4700244 Process and system for compensating for information shifts on disc storage media |
| 10/13/1987 | US4700095 Construction for installing a stepping motor of a floppy disk drive unit |
| 10/06/1987 | US4698798 Device for translating a slide |
| 10/06/1987 | US4698796 Disk recording and/or reproducing apparatus with compensation for extraneous force during track jump |
| 10/06/1987 | US4698795 Tracking servo device |
| 10/06/1987 | US4698710 Stepping motor for a belt drive head travelling mechanism for a floppy disk drive |
| 10/06/1987 | US4698709 Carrier arrangement for magnetic heads of magnetic disk drive assembly |
| 10/06/1987 | US4698702 Playback apparatus for rotary recording medium |
| 10/06/1987 | US4698599 Differential summing amplifier for inputs having large common mode signals |
| 10/06/1987 | US4698523 Servo data demodulator |
| 10/06/1987 | US4697467 Rotary to linear converter for use in a flexible magnetic disk drive or the like |
| 10/06/1987 | CA1227869A1 Track jump control circuit for disk apparatus |
| 09/30/1987 | EP0238832A2 Bearing preload arrangement for a rotary actuator arm stucture in a rotary disc memory drive |
| 09/30/1987 | EP0238755A1 Video signal recording apparatus |
| 09/30/1987 | EP0238627A1 Head load mechanism |
| 09/30/1987 | CN87101767A Converter supporting device |