Patents
Patents for G11B 5 - Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor (87,826)
12/1990
12/12/1990EP0401689A1 Biaxially oriented polyester film
12/12/1990EP0257042A4 Method and apparatus using a stationary saturable member for transferring signals relative to a magnetic storage medium
12/12/1990EP0248897A4 Method and apparatus for magnetic transducing
12/12/1990CN1047751A Circuit of command of modulation of magnetic field or enregistering of magnet-optical
12/12/1990CN1047750A Method and apparatus for recording signals on a record carrier, measurement method and measurement device for use in the recording method and the recording apparatus, and record carrier
12/12/1990CN1047749A Recording medium, recording and reproducing device and recording method
12/12/1990CN1047748A Metal-in-gap magnetic head
12/11/1990US4977549 Write and erase magnetic bias field switching system for a magneto-optic disk drive
12/11/1990US4977472 Servo address system
12/11/1990US4977471 Method for servo formatting disc media for a floppy disk drive
12/11/1990US4977470 Track-following control system for magnetic disk drive
12/11/1990US4977468 Tape edge detecting method and device therefor
12/11/1990US4977419 Self-clocking encoding/decoding film information exchange system using dedicated magnetic tracks on film
12/11/1990US4977230 Heat-resistant film or sheet
12/11/1990US4977040 Magnetic card
12/11/1990US4977021 In situ polymerization of trioxane
12/11/1990US4976992 First applying solvents to edge zones to prevent spreading of extruded coating to them; uniform thickness
12/11/1990US4976989 Method for preparing a magnetic recording medium
12/06/1990DE4017811A1 Support system for carrying flying magnetic disc heads - uses head support in conjunction with air stream to control clearance between head and disc
12/05/1990EP0401041A2 Recording medium, recording and reproducing device and recording process
12/05/1990EP0401000A2 Plate-like magnetite particles and process for producing the same
12/05/1990EP0400984A2 Magnetic recording media
12/05/1990EP0400970A2 Perpendicular magnetic recording medium and production method thereof
12/05/1990EP0400966A2 Method of manufacturing a magnetic head
12/05/1990EP0400946A2 Head mounting structure for high capacity disk drive
12/05/1990EP0400923A2 A disk drive unit and method of control
12/05/1990EP0400793A2 Transducer with improved inductive coupling
12/05/1990EP0400780A1 Microlithographic method for producing thick, vertically-walled photoresist patterns
12/05/1990EP0400726A1 Method and apparatus for recording signals on a record carrier, measurement method and measurement device for use in the recording method and the recording apparatus, and record carrier
12/05/1990EP0400678A2 Signal recording/reproducing apparatus
12/05/1990EP0400242A1 Metal-in-gap magnetic head
12/05/1990EP0400164A1 Method and device for positioning a magnetic head at a magnetic-film memory
12/05/1990EP0400142A1 Thin film magnetic element having a rhombic shape.
12/05/1990EP0181405B1 Dielectric ceramic material
12/05/1990CN2067023U Recorder with endless tape
12/05/1990CN1047583A Copper-mixed silicon-wrapped magnetic recording material and making method
12/05/1990CN1010718B Rotary magnetic head device
12/04/1990US4975795 Electrical connection for a self-loading head assembly for disk drives
12/04/1990US4975794 Bernoulli effect transducer coupler
12/04/1990US4975791 Recording system having head transducers with controlled skew
12/04/1990US4975398 High impact strength ceramic composite head pad material
12/04/1990US4975339 Magneto-optical recording medium with at least one protective layer containing platinum and/or palladium
12/04/1990US4975324 Used in magnetic/optical recording media, computer, video tapes
12/04/1990US4975322 Magnetic recording medium
12/04/1990US4975214 Magnetic iron oxide containing silicon element and process for producing same
12/04/1990CA1277419C Magnetic data storage media
12/04/1990CA1277418C Video signal recording and/or reproducing apparatus
12/03/1990WO1990015409A1 Magnetic field modulation control circuit for recording a magneto-optic memory
12/03/1990CA2033344A1 Magnetic field modulation control circuit for recording data into a magneto-optic memory
12/02/1990CA2018057A1 Recording medium, recording and reproducing device and recording process
11/1990
11/29/1990WO1990014661A1 Non-contact magnetic head assembly for a flexible medium disk drive
11/29/1990WO1990014660A1 Helical scan-type rotary head drum unit
11/29/1990WO1990014659A1 Magnetic latch for disk drive actuator
11/28/1990EP0399848A2 Magnetic recording medium and method of manufacturing the same
11/28/1990EP0399800A2 Thin film magnetic head manufacturing method
11/28/1990EP0399747A2 Substrate used for magnetic disk and magnetic recording medium using the substrate
11/28/1990EP0399689A2 Magneto-optical disc recording apparatus
11/28/1990EP0399517A2 Rotary head cylinder for video tape recorder
11/28/1990EP0250560A4 Magnetic recorder medium having discrete magnetic storage and saturable layers and magnetic signal processing apparatus and method using the medium
11/28/1990EP0169910B1 Rotary head type magnetic image recorder/reproducer
11/28/1990EP0156916B1 Photomagnetic recording and reproducing apparatus having device for detecting direction of magnetization of magnetic recording medium
11/28/1990EP0139021B1 Thermomagnetic optical recording method
11/28/1990CN1010622B Diskette having wear-resistant magnetizable layer
11/27/1990US4974189 Magnetic tape packet assembler/disassembler safeguards existing data with pretries during appends
11/27/1990US4974111 Method and apparatus for electronically processing and rerecording recorded video signals
11/27/1990US4974110 Thin film magnetic head for perpendicular recording and reproducing
11/27/1990US4974109 Hard disk drive employing a reference track to compensate for tracking error
11/27/1990US4974106 Non-contact magnetic head assembly for a flexible medium disk drive
11/27/1990US4974105 Hand-held transducing device
11/27/1990US4974100 Endless tapedrive system
11/27/1990US4973915 Feed forward differential equalizer for narrowing the signal pulses of magnetic heads
11/27/1990US4973525 Metal-insulator composites having improved properties and method for their preparation
11/27/1990US4973515 Stretched minute cellular polyester
11/27/1990US4973496 Method for texturing magnetic disks
11/27/1990US4973123 Electro-optical rotary coupling suitable for tape scanners
11/22/1990EP0397903A1 Rotary disc actuator for a magnetic-disc file
11/22/1990EP0397896A1 Low profil magnetic head suspension
11/22/1990EP0397885A1 Magnetic powder, its production method, magnetic recording medium and magnetic recording method
11/22/1990EP0397713A1 Contoured head assembly for use in a cassette loaded recorder.
11/22/1990DE4015682A1 Position control circuitry for read-write heads with magnetic discs - uses electronic PID circuits with variable gain amplifies in conjunction with reference marks on disc
11/22/1990DE4014107A1 Construction of magnetic layer memories and substrates - uses organically modified silicate(s) or organically modified ceramics
11/22/1990DE4009476A1 Magnetplattengeraet-steuervorrichtung Magnetplattengeraet-control device
11/21/1990CN2066178U Language studying record device
11/20/1990WO1990014662A1 High molecular weight binders for magnetic recording media
11/20/1990US4972396 Multiple independently positionable recording-reading head disk system
11/20/1990US4972395 Opto-magnetic recording apparatus for sequentially driving optical head drive means and biasing magnetic field generation means
11/20/1990US4972337 Device for controlling rotation of a magnet used in a magneto-optical recording system
11/20/1990US4972336 Read while write magnetic head assembly
11/20/1990US4972287 Having a solenoidal energizing coil
11/20/1990US4972286 Grounding pole structures in thin film mganetic heads
11/20/1990US4972285 Cobalt, niobium, zirconium magnetic head, v-shaped magnetic films, bonding to glass
11/20/1990US4972284 Deposited permanent magnet for hard and easy axes biasing of a magnetoresistive head
11/20/1990US4972283 Rotary head drum for a VCR
11/20/1990US4972282 Head carriage mechanism of a magentic disc drive including a wear resistance, low friction slide member
11/20/1990US4972281 Magnetic head supporting device for flexible recording medium
11/20/1990US4972280 Support construction for the transducer of a magnetic head assembly
11/20/1990US4972279 Microminimonolithic magnetic head slider
11/20/1990US4971947 Superconductor magnetic reading and writing heads
11/20/1990US4971932 Multilayer magnetic recording media disks, glass ceramics
11/20/1990US4971896 Method for forming thin film pattern and method for fabricating thin film magnetic head using the same