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)
07/1980
07/29/1980US4214893 Method of making a magnetic powder
07/29/1980CA1082806A1 Device for reading magnetisation patterns
07/29/1980CA1082805A1 Flying head helical scan magnetic recording device employing a lobed rotor
07/29/1980CA1082803A1 Constant wavelength magnetic recording
07/23/1980EP0013363A1 Method of making read/write transducer heads and heads so made
07/23/1980EP0013326A2 Sampled data servo positioning system and sector disk file employing same
07/22/1980US4214287 Novel TSF head pair for dual recording on flexible disks
07/22/1980US4214286 Flexible disk pack and improved transducing-manipulation thereof
07/22/1980US4214279 Clocking system for servo signal having two or more harmonically related frequencies
07/22/1980US4214259 Color video tape recorder/reproducer with chrome corrector
07/22/1980US4213959 Manufacture of acicular, ferrimagnetic iron oxide
07/22/1980US4213870 Includes fluorinated alkyl esters
07/22/1980US4213222 Cleaning apparatus for a web of plastics film having a magnetic coating
07/22/1980CA1082359A1 Recording, reproducing and automatic translation device and related medium
07/15/1980US4213159 Pneumatic clamps and thermomagnetic duplication
07/15/1980US4212903 Heat treatment with alkaline earth or alkali metal hydroxide
07/15/1980CA1081846A1 Head mounting for disc recorder
07/15/1980CA1081805A1 Matrix selection amplifier circuit for low impedance heads in a magnetic disc memory device
07/09/1980EP0012975A2 Transducer head suspension assembly
07/09/1980EP0012913A1 A method of making a thin film magnetic head and a head so made
07/09/1980EP0012912A1 Thin film magnetic transducers
07/09/1980EP0012910A1 Thin film magnetic heads
07/09/1980EP0012897A1 Control apparatus for a recording/playback system using an endless recording medium
07/09/1980EP0012844A1 Transducer carriage assembly
07/09/1980EP0012842A2 Magnetic transducers
07/08/1980US4212044 Platform for magnetic transducers having dust diverter means
07/08/1980US4212043 Magnetic transducing
07/08/1980US4212042 Device for recovering video information from magnetic tape
07/08/1980US4212041 Apparatus and method for removing the effect of interference magnetic fields in a magnetic transducer device for detecting information magnetically coded on a carrier
07/08/1980US4212037 Method for scanning a card with video signal
07/08/1980US4211238 Apparatus and method for recording and playing back electrocardial signals
07/01/1980US4210946 Chromium cobalt alloy
07/01/1980US4210945 Rotary magnetic head assembly
07/01/1980US4210942 Video signal play-back circuit
07/01/1980US4210941 Data-recording device
07/01/1980US4210938 Method and system for speed-modified reproduction of video signals stored on video recording tape
07/01/1980US4210703 Polyester-film backed magnetic recording tape having epoxy subbing layer
07/01/1980CA1080558A1 Magnetic recording material
06/1980
06/25/1980EP0012649A1 Magnetic read head
06/25/1980EP0012326A2 A method of electroplating nickel-iron alloys
06/25/1980EP0012264A1 Data transducing apparatus
06/24/1980US4209813 Dual magnetic head mounting and loading
06/24/1980US4209811 Device for automatically recording, reproducing and translating, and corresponding circuit
06/24/1980US4209810 Di-gap, variable-frequency recording technique and associated system
06/24/1980US4209809 Apparatus and method for record reorientation following error detection in a data storage subsystem
06/24/1980US4209412 Containing zinc and phosphorus; magnetic acicular particles
06/17/1980US4208685 Disk storage apparatus having an electrically tuned head-carriage actuator
06/17/1980US4208684 Damper for constant load arm
06/17/1980US4208683 Frusto-conical magnetic recording disc
06/17/1980US4208680 Real time magnetic video digital recording and reproducing apparatus
06/17/1980US4208679 Transducer positioning system for rotating disk drive units
06/17/1980US4208673 Color recorder for reducing crosstalk
06/17/1980US4208622 Motor circuit of a tape recorder
06/17/1980US4208447 Method for disorienting magnetic particles
06/17/1980US4207644 Tape head cleaning device
06/17/1980CA1079850A1 Secure property document and method of manufacture
06/17/1980CA1079849A1 Transducer support and stabilizer
06/17/1980CA1079848A1 Disk storage apparatus having signals recorded in a specific format
06/17/1980CA1079847A1 Magnetic disk information storage apparatus
06/17/1980CA1079846A1 Record track following and seeking
06/17/1980CA1079845A1 Data storage apparatus
06/17/1980CA1079844A1 Retry method and apparatus for use in a magnetic recording and reproducing system
06/17/1980CA1079514A1 Polymodal magnetic recording media process for making and verifying the same and compositions useful therein
06/11/1980EP0011831A1 Position shift apparatus
06/10/1980US4207601 Transient temperature compensation for moving head disk drive
06/10/1980CA1079398A1 Magnetic transducer for narrow track recording and playback and method of manufacture thereof
06/10/1980CA1079396A1 Stepper for slow motion disc recorder
06/10/1980CA1079057A1 Stabilization of chromium dioxide magnetic pigments
06/10/1980CA1079028A1 Process for the production of chromium dioxide
06/03/1980US4206489 Device for the automatic loading/unloading of at least one magnetic head in a magnetic disc drive
05/1980
05/28/1980EP0011494A1 Method and apparatus for controllably rotating an information storage disc
05/28/1980EP0011425A1 A method for accessing a disc in a flexible disc memory
05/28/1980EP0011149A1 Positioning device for magnetic heads
05/27/1980US4205356 Erasing head
05/27/1980US4205355 Flexible disk drive apparatus
05/27/1980US4205351 Digital data recorder
05/27/1980US4205120 Nonferrous, nonmagnetic interlayer
05/27/1980US4204315 Method of producing a magnetic transducer device
05/27/1980CA1078513A1 Actuator mechanism for disk storage apparatus
05/27/1980CA1078512A1 Positioning system for data storage apparatus
05/27/1980CA1078509A1 Read/write apparatus for magnetic recorders
05/20/1980US4204235 Support arm assembly for loading/unloading and applying a force on a flying head
05/20/1980US4204234 System for positioning single gap magnetic head to follow moving recorded data track
05/20/1980US4203856 Lubricants comprising fluoroalkyl esters
05/20/1980CA1078063A1 Noise reduction circuit
05/14/1980EP0011053A1 Method for obtaining a credit card having an anisotropic, uniaxial magnetization and credit card obtained thereby
05/14/1980EP0010689A1 Process for the manufacture of laminar magnetic record carriers
05/14/1980EP0010664A1 Method and apparatus for positioning a transducing head
05/14/1980EP0010644A1 Erasing device for a record carrier which produces visually recognisable recordings by using a magnetic recording element
05/14/1980EP0010626A1 A magnetic recording medium
05/13/1980US4203140 Helical scan VTR with deflectable head
05/13/1980US4203139 Play/record switching circuit for a signal reproducing and recording apparatus
05/13/1980US4203137 Dual mode read preamplifier with electrical short detector
05/13/1980US4202932 Magnetic recording medium
05/13/1980US4202927 Cationic surfactant layer
05/13/1980US4202871 Production of acicular ferric oxide
05/06/1980US4202022 Magnetic transfer record film and apparatus for magneto-optically reading magnetic record patterns using the same
05/06/1980US4202020 Magnetic head load control system
05/06/1980US4202019 Timing circuit and method for a track following servo in a data storage system
05/06/1980US4202017 Magnetic recording signal equalization apparatus
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