Patents
Sitemap › G11 - Information storage › G11B - Information storage based on relative movement between record carrier and transducer › G11B 21 - Head arrangements not specific to the method of recording or reproducing
Patents for G11B 21 - Head arrangements not specific to the method of recording or reproducing (20,963)
11/1990
11/07/1990EP0396393A2 An actuator arm for a disc drive
11/07/1990EP0396285A2 Recording/reproducing compressed data on a rotatable record medium
11/06/1990US4969059 Offset nulling system for computer disk drives
11/06/1990US4969058 CArriage assembly for high track density flexible magnetic disk drive
11/06/1990US4969056 Apparatus for recording information on a disc
11/06/1990CA1275801C Optical proximity imaging method and apparatus
11/01/1990CA2015842A1 Design for an actuator arm for a disc drive
10/1990
10/31/1990EP0394572A1 Data storage device
10/31/1990EP0394322A1 Disk drive servo control system
10/30/1990US4967403 Multi-format optical disk and reading device
10/30/1990US4967292 Head position controller for a disc storage unit
10/25/1990WO1990013093A1 Improved magnetic disk drive apparatus and method
10/25/1990DE4013009A1 Plattenlaufwerk Disk drive
10/25/1990CA2053264A1 Magnetic disk drive apparatus and method
10/24/1990EP0394062A2 Position control device for positioning magnetic head on selected track
10/24/1990EP0393116A1 Servo pattern.
10/24/1990EP0221936B1 Automatic correction system for the servo-circuit of a device with optical scanning of a rotating information support
10/23/1990US4965781 Data reading device having servo controlled position reset
10/23/1990US4965691 Sealed removable cartridge for use with a high density disc drive with magnetic clutch
10/23/1990US4965684 Low height disk drive
10/23/1990US4965501 Servo circuit
10/23/1990US4964941 Apparatus for mounting a magnetic head on a suspension arm
10/23/1990CA1275503C Micro mechanical actual transducer head on a slider
10/23/1990CA1275502C2 Still image recording and/or reproducing apparatus
10/17/1990EP0392853A2 An apparatus for recording and reproducing information on and from an optical disk
10/17/1990EP0392777A2 Track access control system in rotating disc devices with eccentricity correction
10/16/1990US4964111 Slider control device for disk player
10/16/1990US4964009 Magnetic disk having an index area and a limited number of radially extending servo sections
10/16/1990US4963806 Servo positioning apparatus
10/10/1990EP0391677A1 Load correction method in retrieval apparatus
10/10/1990EP0391627A2 Speed detection apparatus, speed control motor, and track jump control circuit
10/10/1990EP0391145A2 Pickup driving device for disk player
10/09/1990US4962480 Memory reading apparatus
10/03/1990EP0390467A2 Digital servo control apparatus
10/02/1990US4961123 Magnetic information media storage with optical servo tracks
10/02/1990US4961121 Air bearing slider rail design with trumpet-shaped rail portion
10/02/1990CA1274911A1 Still image recording and/or reproducing apparatus
09/1990
09/26/1990EP0220251B1 Automatic correction system for the servo-circuit of a device with optical scanning of a rotating information support
09/26/1990CN1009774B Improved magnetic head supporting device
09/25/1990US4959599 Head positioner
09/25/1990CA1274624A1 Process and system for compensating for information shifts on disc storage media
09/20/1990WO1990010931A1 Voice coil actuator
09/20/1990WO1990010930A1 Estimator positioning system and method
09/19/1990EP0388087A2 Linear actuator for a disk file
09/19/1990EP0387444A2 Subambient pressure air bearing
09/19/1990EP0387443A1 Method and apparatus for testing operation of a memory device
09/18/1990US4958245 Apparatus and method for optical servo control with media having information storage and servo control regions of different reflectivities
09/12/1990EP0387224A2 Position servo system and its method of operation
09/12/1990EP0387147A2 Head actuator for disc drive and storage system and method for its manufacture
09/12/1990EP0387104A1 Servo system for positioning transducer heads
09/12/1990EP0387018A2 Track access control method and apparatus for optical disk apparatus
09/11/1990US4956831 Low acoustic noise head actuator
09/11/1990US4956735 Actuator magnetic circuit
09/05/1990EP0385696A1 Disk drive with an actuator locking system
09/04/1990US4955010 Constant velocity track jump servo system for disc players
09/04/1990US4955009 Optical disk drive apparatus having counter disable at seek start-up
09/04/1990US4955008 Prewritten data storage medium and optical scanning device therefor
09/04/1990US4954909 Data memorizing device which determines the movement of the recording head
09/04/1990US4954908 Record medium control apparatus
09/04/1990US4954907 Head positioning control method and system
09/04/1990US4954905 Data transducer position control system for disk storage drive system
09/04/1990US4954904 Method and apparatus for preventing head crashes in a disk system
08/1990
08/29/1990EP0384833A2 Head exchange system for disc drive system
08/29/1990CN2061326U Pick-up transfer mechanism of disk-type recording medium reproducing device
08/23/1990WO1990009660A1 Disk drive head lift mechanism
08/23/1990WO1990009659A1 Carrier and method of attachment for disk file head/arm assemblies
08/22/1990EP0383562A1 Optical information recording and/or reproducing apparatus with device for prohibiting movement of optical head
08/22/1990EP0383551A1 Disk drive with actuator returning and holding device
08/22/1990EP0383377A1 Arrangement for reproducing an electric signal
08/21/1990US4951272 System and method for accessing tracks for optical disc apparatus
08/21/1990US4951162 Tracking control system with pilot signal phase setting circuitry
08/16/1990EP0382280A1 Apparatus for scanning a disc-type information carrier
08/16/1990EP0382192A1 Scanning tunneling microscope memory apparatus
08/14/1990US4949323 Disk reproduction apparatus and method for high speed accessing of desired information data by checking address data
08/14/1990US4949206 Crash stop for rotary disk drive actuator
08/14/1990US4949194 Ceramic support arm for movably positioning transducers
08/14/1990CA1272803A1 Apparatus for reading information from a record carrier
08/08/1990EP0381519A2 Stepper motor torque variance compensation using varied applied voltage
08/08/1990EP0381368A2 Rigid disk drive with secured shaft
08/08/1990EP0381314A2 Servo circuit
08/08/1990EP0381158A2 Memory device
08/08/1990EP0381113A2 Tunnel current data storage apparatus having separate lever bodies
08/07/1990US4947383 Machine readable markers for cartesian information storage media
08/07/1990US4947274 Resiliently mounted crash stop and magnetic latch for a voice coil actuator
08/07/1990US4947272 Signal reproducing device which offsets the tracking error signal for a digital tape player
08/03/1990CA2009154A1 Stepper motor torque variance compensation using varied applied voltage
08/01/1990EP0380284A1 Apparatus for and methods of producing tracking control signals
08/01/1990EP0380256A1 Disc drive safety latch using shape memory metals
08/01/1990EP0243466B1 Apparatus and method for damping head positioners for disk drives
08/01/1990EP0160095B1 Tracking servo circuit for optical disk
08/01/1990CN1009036B Apparatus for positioning plurality of scanning devices
08/01/1990CN1009035B Optical disc driving device
07/1990
07/31/1990US4945526 Actuator assembly for optical disk systems
07/31/1990US4945515 Memory writing apparatus
07/31/1990US4945435 Noninfluencing fastener for disk drives
07/31/1990US4945434 Magnetic recording head employing an I-bar core structure
07/31/1990US4945427 Magnetic disk recording with variable track width and variable track density
07/25/1990EP0378913A2 Apparatus and process for measuring data disk runout and acceleration parameters
07/25/1990EP0378650A1 Process and circuit arrangement for compensating offset voltages in a focus and/or track-regulating circuit
07/24/1990US4943876 Magnetic head positioning apparatus for floppy disk drive
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