Patents
Sitemap › G11 - Information storage › G11B - Information storage based on relative movement between record carrier and transducer › G11B 5 - Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
Patents for G11B 5 - Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor (87,826)
11/1990
11/20/1990US4971648 Apparatus for bonding hubs to diskettes
11/20/1990CA2050337A1 High molecular weight binders for magnetic recording media
11/15/1990WO1990013893A1 Temperature-resistant, play-free bearing arrangement for a rotary component
11/15/1990DE4014113A1 Magnetic storage disc mfr. - involving etching of interlayer before applying magnetic storage layer
11/14/1990EP0397322A2 An actuator magnetic circuit and method therefore
11/14/1990EP0397118A2 Disc control apparatus and operating method thereof
11/14/1990CN1010443B Data storage apparatus
11/14/1990CN1010439B Apparatus of tracking for video tape
11/13/1990US4970621 Demagnetization of thin film magnetic recording transducers utilizing a decreasing AC current
11/13/1990US4970616 Recording head to minimize undershoots in readback pulses
11/13/1990US4970615 Pole design for thin film magnetic heads
11/13/1990US4970614 Adjustable magnetic recording and reproducing head unit
11/13/1990US4970613 Head base supporting device in auto-reversal tape player
11/13/1990US4970611 Variable tape speed head-carrier drum control apparatus
11/13/1990US4970610 Magnetic disk drive start procedure for starting reaction torque amplification
11/13/1990US4970127 Hydroxyalkyl (meth)acrylate and unsaturated acid comonomers; heat resistance
11/13/1990US4970124 New magnetic metallic particles using rare-earth elements
11/13/1990US4970121 Binder mixture of polycarbonate polyurethane and phenoxy resin
11/13/1990US4969962 Magnetic alloys for magnetic head
11/13/1990US4969253 Method for producing a magnetic head
11/13/1990US4969252 Method of assembling a magnetic tape head having a brass shield
11/13/1990CA1276290C Video signal reproducing apparatus using pilot signal system
11/08/1990DE3914565A1 Magnetic recording carrier - with first magnetic layer contg. cobalt ferrite and second magnetic layer contg. chromium di:oxide
11/07/1990EP0396393A2 An actuator arm for a disc drive
11/07/1990EP0396227A2 Magnetic devices with enhanced poles
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
11/06/1990US4968564 High density, coercive force, corrosion resistance
11/06/1990US4968557 Magnetic recording medium
11/06/1990US4968528 Precoating with solvent to prevent entrapment of air
11/06/1990US4967466 Method for producing magnetic head core
11/06/1990CA1275801C Optical proximity imaging method and apparatus
11/06/1990CA1275782C Process for producing acicular particles containing an iron carbide
11/01/1990WO1990013115A1 Method of producing substrates for magnetic disks
11/01/1990WO1990013114A1 Magnetic card
11/01/1990WO1990013113A1 Process for positioning a magnetic-disc memory, and device for carrying out the process
11/01/1990CA2015842A1 Design for an actuator arm for a disc drive
10/1990
10/31/1990EP0395193A2 Apparatus and method to improve uniformity of tent around scanner
10/31/1990EP0395119A2 Magnetic saturation controlled scanning magnetic transducer
10/31/1990EP0395111A2 Method of manufacturing high magnetic flux density electrodeposited quarternary alloy thin film
10/31/1990EP0394941A2 Drive circuit for stepping motor
10/31/1990EP0394586A1 Plate-like composite ferrite fine particles for magnetic recording and a process for producing the same
10/31/1990EP0394572A1 Data storage device
10/31/1990EP0394539A1 Temperature-insensitive tightly fitting bearing for a rotating component
10/31/1990EP0394457A1 Magnetic recording/reproducing apparatus
10/31/1990EP0394360A1 Process for recording servo position information embedded in data tracks of rotating record carriers
10/31/1990EP0394322A1 Disk drive servo control system
10/30/1990US4967301 Shallow magnetic head shield for reducing feedthrough
10/30/1990US4967300 Magnetic head assembly having a transverse guiding surface formed of a mixture of aluminum oxide and titanium carbide
10/30/1990US4967299 Thin-film magnetic head with a plurality of transducers
10/30/1990US4967298 Magnetic head with magnetoresistive sensor, inductive write head, and shield
10/30/1990US4967297 Magnetic disk head positioning device
10/30/1990US4967296 Lightweight, rigid, compact configuration for the voice coil, carriage and printed circuit cable in a disc drive
10/30/1990US4967294 Magnetic recording/reproducing device which discriminates recorded and unrecorded tracks
10/30/1990US4967293 Multi-positioner magnetic disk storage apparatus having means for reducing mechanical vibration interference between positioners
10/30/1990US4967292 Head position controller for a disc storage unit
10/30/1990US4967291 Method and apparatus for preventing an over-velocity error condition of a hard disk drive system
10/30/1990US4967290 Multiple channel rotary magnetic head scanner having stackable electro-optical signal transmission modules
10/30/1990US4967289 PCM signal recording apparatus
10/30/1990US4967036 Arrangement for controlling the position of the head mounting plate in a magnetic tape apparatus
10/30/1990US4966821 Perpendicular magnetic recording medium
10/30/1990US4966797 Process for producing magnetic recording medium, magnetic paint, and magnetic disk
10/30/1990US4966648 Process for producing thin film magnetic head
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
10/24/1990EP0394034A2 Magnetic iron oxide particles
10/24/1990EP0393706A2 Rotary head drum for a video tape recorder
10/24/1990EP0393633A2 Low frequency component restoration circuit for restoring and compensating for low frequency component lost in digital signal transmission system
10/24/1990EP0393582A2 Rotary magnetic head device and rotary transformer used therefor
10/24/1990EP0393563A2 Acicular cobalt-modified iron oxide and process for its manufacture
10/24/1990EP0393116A1 Servo pattern.
10/24/1990EP0263043B1 Stiff polymer substrate for use as a magnetic-registration carrier, and magnetic disc obtained from this substrate
10/24/1990CN2064531U Frequency demultiplication head
10/23/1990US4965873 Pilot enhanced/amplitude equalized impulse magnetic
10/23/1990US4965688 Permanent magnet type erasing head
10/23/1990US4965685 Removable cartridge disc drive with radial arm voice coil actuator
10/23/1990US4965684 Low height disk drive
10/23/1990US4965501 Servo circuit
10/23/1990US4965307 Polyester film
10/23/1990US4965125 Magnetic recording medium and the method for preparing the same
10/23/1990US4965120 Magnetic recording medium
10/23/1990US4964941 Apparatus for mounting a magnetic head on a suspension arm
10/23/1990US4964242 Apparatus for texturing rigid-disks used in digital magnetic recording systems
10/23/1990US4964212 Process for producing electrical connections through a substrate
10/23/1990CA1275503C Micro mechanical actual transducer head on a slider
10/23/1990CA1275498C Apparatus for recording a digital data
10/23/1990CA1275496C Apparatus for recording and/or reproducing an information signal
10/21/1990CA2015029A1 Carbon overcoat and method of its making and testing
10/21/1990CA2015011A1 Rotary head drum for a video tape recorder
10/18/1990WO1990012398A1 Magnetic head contour utilizing facets for air film skiving
10/18/1990WO1990012396A1 Remote controller for dubbing and video tape recorder with synchronous dubbing function
10/18/1990WO1990012393A1 A method of and an arrangement for manufacturing coded tapes
10/18/1990WO1990012392A1 Magnetic recording medium
10/18/1990WO1990012391A1 Disk drive system and method
10/18/1990WO1990012390A1 Thin-film magnetic recording head with double gap for a recording medium to be vertically magnetized
10/18/1990DE4011694A1 Magnetische aufzeichnungsvorrichtung Magnetic recording apparatus
10/17/1990EP0392931A1 Process for depositing, on a surface of a magnetic disk, a layer permitting the flight of the write/read head over the disk, and the resulting magnetic disk
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