Patents
Patents for G11B 21 - Head arrangements not specific to the method of recording or reproducing (20,963)
01/1994
01/11/1994US5278711 Disk drive assembly
01/11/1994US5278709 Magnetic storage disk
01/11/1994US5278704 Information processing apparatus including magnetic material having a predetermined magnetization pattern with respect to a recording medium
01/05/1994EP0577214A2 Zoned record carrier
01/05/1994EP0576839A2 A rotary actuator disk drive
01/05/1994EP0576803A1 Air bearing magnetic head slider
01/05/1994EP0576723A1 Magnetic head and method of manufacturing a magnetic head
01/05/1994EP0576680A1 Magnetic head assembly, its manufacture, and magnetic disc device
01/04/1994US5276573 Slider unit controllably actuated at a surface of a moving information recording medium
01/04/1994US5276570 X-distance compensating circuit for adjusting head-switching time by controlling the synchronization of record and playback control pulses to/from a magnetic tape of a magnetic recording/reproducing apparatus
01/04/1994US5276564 Programmable start-of-sector pulse generator for a disk drive using embedded servo bursts and split data fields
12/1993
12/29/1993EP0576135A1 Control apparatus for a disk storage system
12/29/1993EP0575934A2 Recording and reproduction of information in ROM-RAM storage media
12/28/1993US5274519 Magnetic recording apparatus with air vane actuated regulating member for head slider
12/28/1993US5274511 Servo signal recording method and apparatus
12/28/1993US5274510 Track address pattern for a disk memory apparatus
12/28/1993US5274507 High performance disk storage system
12/23/1993WO1993026007A1 Steering laser beam while etching optical servo tracks for magnetic disks
12/23/1993WO1993026004A1 Apparatus for and method of verifying etching of optical servo information on magnetic media
12/23/1993WO1993025343A1 Pneumatic hub locking device for etching optical servo tracks on magnetic disks
12/23/1993WO1993025341A1 Acousto-optical intensity control of laser beam
12/22/1993CN1023280C Digital transmission system using subband coding of digital signal
12/21/1993US5272688 Apparatus for writing and/or reading information on and/or from optical card
12/15/1993CN1079575A Liquid-bearing data recording disk file with transducer carrier having rear ski pad at the head-disk interface
12/14/1993US5270885 Hard-disk storage apparatus with memory storing data-head control information
12/14/1993US5270880 Predictive read-write inhibit decision using fuzzy logic
12/14/1993US5270529 Device for sensing rotary head position of magnetic recording and reproducing apparatus
12/14/1993CA1325272C Head driving apparatus
12/08/1993EP0573290A1 Tracking-servo-system controller in an optical-disk player
12/08/1993EP0573286A2 Limit stop for disc drives
12/08/1993EP0573160A1 Crash stop and magnetic latch for optimum use of disc space
12/08/1993EP0572789A2 Apparatus and method for shock attenuation in a disk recording and/or reproduction system
12/07/1993US5268884 Seek control method and apparatus for disk apparatus
12/07/1993US5268883 Track access device and tracking control device
12/07/1993US5268804 Actuator arm controller for a storage device
12/07/1993US5268801 Sealed disk drive unit having an internal dynamic mechanism
12/07/1993US5268800 Disk drive servosystem using gray code
12/07/1993CA2006127C Atf controller for digital audio tape recorder
12/04/1993CA2096552A1 Tracking-servo-system controller in an optical-disk player
12/01/1993EP0572255A2 Device for and method of searching time code recorded on disk
12/01/1993EP0572042A2 High-speed search method for use in a disc player system
11/1993
11/30/1993US5267227 Disk storage apparatus with an actuator locking device
11/30/1993US5267144 Access method of an actuator and control apparatus therefor
11/30/1993US5267110 Rotary actuator for a direct access storage device
11/30/1993US5267109 Air bearing slider with relieved trailing edge
11/30/1993US5267104 Liquid-bearing data recording disk file with transducer carrier having rear ski pad at the head-disk interface
11/30/1993US5266769 Process for independent control of crown and camber for magnetic head slider
11/30/1993US5265325 Tooling for assembly of compact disk drive
11/24/1993CN1022870C Disk file or tape drive with high servo sample rate
11/24/1993CN1022869C Transducer head skew arrangement for sidk drive system
11/23/1993US5265080 Servo phase compensation selection system for an optical disc player
11/23/1993US5265079 Seek actuator for optical recording
11/23/1993US5264771 Stepping motor control system
11/23/1993CA1324663C Servo gain compensation in a disc drive
11/23/1993CA1324662C Disk recording and/or reproducing apparatus
11/18/1993EP0569593A1 Disc device
11/18/1993EP0569547A1 Microstructure array and activation system therefor
11/18/1993EP0569412A1 Track control circuit
11/18/1993EP0563267A4 Rotary inertial latch for disk drive actuator
11/16/1993US5262913 Easily adjustable crash stop for a disc drive
11/16/1993US5262912 Limit stop and limit stop incorporating a flux concentrator latch for disc drives
11/16/1993US5262907 Hard disc drive with improved servo system
11/16/1993CA1324438C Center of percussion head actuator assembly
11/11/1993DE4314167A1 Pendular positioner, e.g. for magnetic diskette drive - has moving coil at end of pendular arm swinging in air gap between flat permanent magnet and upper yoke
11/10/1993EP0568632A1 Laminated load beam
11/10/1993EP0363468B1 Magnetic recording device using circumferentially offset heads with double sided media
11/10/1993EP0299084B1 Circuitry and method for controlling positioning of a head in a data storage device
11/09/1993US5260847 Sleeveless rotatable beryllium/aluminum actuator arm for a magnetic disc drive
11/09/1993US5260846 Compact hard disk assembly having a head carriage positioning arts located within the outer circumference of a hard disk
11/09/1993US5260634 Constant current driving system for a stepper motor in rotating disk
11/09/1993US5260618 Space optimization voice coil motor for disc drives
11/03/1993EP0568257A1 Data transfer head
11/03/1993EP0568252A1 Transducer assembly and data recording disk file incorporating same
10/1993
10/31/1993CA2090708A1 Combination transducer/slider/suspension and method for making
10/27/1993EP0567315A1 Method and apparatus for the reproduction of a partially recorded optical disk
10/27/1993EP0566998A2 Sliding-type magnetic head for magnetooptical recording
10/26/1993US5257252 Adaptive control system for a disk drive actuator
10/26/1993US5257250 Tracking-control target-position adjustment method
10/26/1993US5257151 Disc-drive with a rim-motor
10/26/1993US5257147 Method for setting tracking data of variable speed modes in a video tape recorder
10/26/1993US5257143 Method and apparatus for positioning head of disk drive using zone-bit-recording
10/26/1993US5257111 Continuous both-side playback type video disc apparatus
10/26/1993US5257091 Optical alignment system for aligning a multiple gap tape head assembly
10/21/1993DE4212539A1 Automatic tracking for video recorder with inserted time reference - picking up defined change in signal series in period before and/or after useful signal gaps
10/20/1993EP0566146A2 Optical disk apparatus
10/20/1993EP0565856A2 Programmable start-of-sector pulse generator for a disk drive using embedded servo bursts and split data fields
10/19/1993US5255253 Apparatus and method for controlling the velocity of a disk storage head
10/19/1993US5255249 Seek control apparatus
10/19/1993US5255135 Method of loading slider and magnetic disk apparatus
10/19/1993US5255131 Asynchronous servo identification/address mark detection for PRML disk drive ssytem
10/19/1993US5254995 Analog to digital peak detector utilizing a synchronization signal
10/19/1993CA1323421C Disc drive slider configured to counteract roll
10/19/1993CA1323420C Controlled drag for magnet actuator
10/14/1993WO1993020557A1 Data recording medium and data recording apparatus
10/13/1993EP0565162A2 Predictive read-write inhibit decision using fuzzy logic
10/13/1993EP0565155A1 System and method for improved settling of a read/write transducer in a direct access storage device
10/13/1993EP0564763A1 Disk drive having an improved transducer suspension assembly
10/13/1993EP0564762A2 Disk drive having an improved transducer suspension assembly
10/13/1993EP0556302A4 Multiple actuator disk drive
10/12/1993US5253242 Double-sided optical disc player