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)
11/1980
11/25/1980US4236185 Method for distortion-free still picture reproduction with magnetic video tape
11/25/1980US4235655 Continuous coating of webs having spliced joints
11/18/1980US4234899 Keyed mounting for orienting optical angular, displacement transducer in rigid magnetic disc memory
11/18/1980US4234438 Magnetic recording medium
11/18/1980CA1089772A1 Circuitry for compression of silence in dictation speech recording
11/12/1980EP0018646A1 Magnetic-head positioning device for a magnetic-tape apparatus
11/12/1980EP0018584A1 Recording tape with a leader, particularly magnetic tape and tape spool
11/12/1980EP0018383A1 Automatic cassette head demagnetizer
11/11/1980US4233637 Rotating magnetic head piezo-electric assembly and drive circuitry for video tape recorder
11/11/1980US4233352 Polyester film and method of manufacture thereof
11/11/1980CA1089563A1 Recording and/or reproducing apparatus
11/04/1980US4232072 Protective compositions for recording
11/04/1980US4232071 Method of producing magnetic thin film
11/04/1980US4232061 Magnetic recording medium and process for producing the same
11/04/1980CA1089094A1 Magnetic card
11/04/1980CA1089092A1 Reproducing system
10/1980
10/29/1980EP0018267A1 Magnetic recording method and apparatus
10/29/1980EP0018157A1 High storage density disc file
10/29/1980EP0018156A1 Recording and replay apparatus employing rotary media
10/29/1980EP0018009A1 Modified acicular magnetic iron oxide, process for its production and its use in producing magnetic-recording supports
10/29/1980EP0017834A1 Magnetic recording medium and process for its manufacture
10/29/1980EP0017698A1 Record member playback apparatus
10/28/1980US4231071 Reader for data recorded on magnetic disks at plural densities
10/28/1980CA1088665A1 Method of and apparatus for modifying a video signal to prevent unauthorized recording and reproduction thereof
10/21/1980US4229773 Video signal recording system with automatic head positioning
10/21/1980US4229770 Method of recording on a magnetic tape which is attached to a card
10/21/1980US4229312 Method of manufacturing a paint composite for magnetic films
10/21/1980CA1088205A1 Tape recorder
10/21/1980CA1087990A1 Dual medium dictation recording and transcription system
10/15/1980EP0017175A1 Data storage system and magnetic discs therefor
10/14/1980US4228473 Pick-up device for magnetically recorded information and method and system for using same
10/14/1980US4228348 Security document and system
10/14/1980US4227947 Method for modifying the easy direction of magnetization of an amorphous magnetic film
10/07/1980US4227225 Magnetic head assembly
10/07/1980US4226909 Cobalt-doped acicular hyper-magnetite particles
10/07/1980US4226681 Vapor depositing ferromagnetic metal containing cobalt on a heated substrate or subbing layer containing copper
10/07/1980US4226018 Method for manufacturing a floating type thin film magnetic head
10/07/1980CA1086986A1 Amorphous magnetic alloy
10/07/1980CA1086914A1 Process for production of magnetite spheres with an arc heater
10/01/1980EP0016447A1 Method of polishing the surfaces of magnetic recording discs
10/01/1980EP0016404A1 Magnetic recording carrier and process for its manufacture
09/1980
09/30/1980US4225893 Cleaner for a playing head of a cassette player
09/30/1980US4225892 Molecular orientation of single crystal sapphire
09/30/1980US4225891 Fly off platform for magnetic transducers having means for reducing unstick time
09/30/1980US4225889 Magnetic recording and reproducing apparatus having means for recording a cue-signal
09/30/1980CA1086857A1 Cleaning jackets
09/23/1980US4224649 Automatic cassette head demagnetizer
09/23/1980US4224400 Method of manufacturing a magnetic head by photo-etching
09/23/1980US4224381 Abrasion resistant magnetic record members
09/23/1980US4224175 Process for the preparation of magnetic powders based on γ-Fe2 O3
09/18/1980WO1980001964A1 Noise reduction apparatus
09/17/1980EP0015692A1 A process for producing a magnetic recording medium
09/17/1980EP0015485A1 Ferromagnetic metallic pigment essentially consisting of iron, and process for its preparation
09/17/1980EP0015383A1 Magnetic head slider assembly
09/16/1980US4223361 Magnetic recording medium
09/16/1980US4223360 Magnetic recording transducers
09/16/1980US4223359 Flexible magnetic disk recording apparatus
09/16/1980US4223358 Method and apparatus for cancelling the remanent deflection in a _piezoceramic head support means of a video recorder
09/16/1980US4223349 System for rotating an information storage disc at a variable angular velocity to recover information therefrom at a prescribed constant rate
09/16/1980CA1085901A1 Electromagnetic induction actuator for magnetic disc file
09/09/1980US4222084 Magnetic head
09/09/1980US4222082 Magnetic disk apparatus with automatic fast head advance
09/09/1980US4222081 Information reading device for a multitrack storage device
09/09/1980US4222078 Method and apparatus for recording of wide band signals, particularly video signals
09/09/1980US4221776 From goethite, reduction, oxidation
09/09/1980US4221316 NAB Tape cartridge eraser and splice finder
09/03/1980EP0014903A1 Method for the preparation of acicular magnetic cobalt containing iron oxide
09/03/1980EP0014902A1 Method of preparing acicular magnetic cobalt containing iron oxide
09/03/1980EP0014889A1 Method for the preparation of acicular ferromagnetic iron particles
09/02/1980US4220979 Bias level setting circuit for tape recorders with staircase high frequency signal
09/02/1980US4220117 Apparatus for fabrication of magnetic recording media
08/1980
08/26/1980US4219855 Thin film magnetic head
08/26/1980US4219854 Thin film magnetic head assembly
08/26/1980US4219853 Read/write thin film head
08/26/1980CA1084621A1 Magnetic disc, especially a flexible magnetic disc, for track adjustment and amplitude control
08/26/1980CA1084442A1 Electrochemical tape cleaning
08/20/1980EP0014382A2 Iron oxide pigments in the form of platelets, process for their preparation and their use
08/20/1980EP0014363A1 Cobalt-doped ferrimagnetic iron oxides and process for producing them
08/20/1980EP0014311A1 Method of correcting head-to-track alignment, rotating head magnetic tape unit and magnetic tape
08/20/1980EP0014302A1 Process for producing needle-shaped highly coercive gamma-iron(III) oxide
08/20/1980EP0014231A1 Information storage apparatus
08/19/1980US4218722 Compact hand-held demagnetizing device
08/19/1980US4218715 Magnetic head slider assembly
08/19/1980US4218714 Double side type flexible magnetic disc drive apparatus
08/19/1980US4218659 Amplifier circuit for a hall-effect head
08/19/1980US4218155 Stick for applying a liquid
08/19/1980CA1084129A1 Rotary transformer with unique physical and electrical characteristics
08/12/1980US4217636 Computer performance measurement device and process
08/12/1980US4217613 Magnetic transducer head core
08/12/1980US4217612 Servo system for track accessing and track following in a disk drive
08/12/1980US4217168 Magnetic core formed from laminations
08/12/1980US4217152 Process for production of ferromagnetic powder
08/06/1980EP0013884A1 Phase-locked oscillator circuit and system for generating a clock signal using this circuit
08/06/1980EP0013883A1 Thin magnetic film heads
08/05/1980US4216505 Transducer head vibration dampening
08/05/1980US4215467 Method of producing a magnetic head platform
07/1980
07/29/1980US4215376 Circuit arrangement for the digital correction of time base errors of a television signal using variable addressing of a memory
07/29/1980US4215362 Track selection method and apparatus
07/29/1980US4215158 Magnetic recording medium and process for producing the same
07/29/1980US4214960 Method of electrolytically etching ferrite
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