| Patents for G11B 5 - Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor (87,826) |
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| 04/21/1981 | US4263629 Disk file with symmetrical hollow base |
| 04/21/1981 | US4263627 Electronic tachometer |
| 04/21/1981 | US4263626 Control system for a tape recorder |
| 04/21/1981 | US4263624 Analog recording on magnetic media |
| 04/21/1981 | US4263188 Aqueous coating composition and method |
| 04/21/1981 | CA1099814A1 Track following servo system and track following code |
| 04/16/1981 | WO1981001071A1 Z-axis flexure suspension apparatus |
| 04/16/1981 | WO1981001070A1 Transducers and supporting arm assembly for double sided floppy disk |
| 04/15/1981 | EP0026837A1 Flexible magnetic disk drive machine |
| 04/14/1981 | US4262313 Bias current setting apparatus in a magnetic recording and reproducing apparatus |
| 04/14/1981 | US4262304 Low level/signal booster for television transition |
| 04/14/1981 | US4261222 Ball bearing cam assembly |
| 04/08/1981 | EP0026524A1 Apparatus for recording and/or reproducing signals in a plurality of parallel longitudinal tracks on a magnetic tape |
| 04/08/1981 | EP0026523A1 Apparatus for recording and/or reproducing information on a magnetic tape |
| 04/08/1981 | EP0026496A1 Magnetic recording disc and method for forming a protective overcoating thereon |
| 04/08/1981 | EP0026451A2 Circuit arrangement for the protection of data stored on a magnetic record carrier |
| 04/08/1981 | EP0026320A1 Data recorder/reader and method of operating same |
| 04/07/1981 | US4261024 Transducer platform |
| 04/07/1981 | US4261023 Magnetic recording reproducing apparatus |
| 04/07/1981 | US4260914 Differential linear velocity transducer |
| 04/07/1981 | US4260648 Method for forming magnetic recording regions on photographic elements |
| 04/07/1981 | US4260466 Simultaneous vapor deposition of a ferromagnetic material and a polymer or monomer |
| 04/07/1981 | US4260450 Dielectrics, etching |
| 04/01/1981 | EP0025885A1 Magnetic recording system |
| 04/01/1981 | EP0025826A1 Flying magnetic head/arm transducer assembly |
| 03/31/1981 | US4259703 Magneto resistive magnetic transducers |
| 03/31/1981 | US4259605 Circuit for controlling a piezo-electric positioning element |
| 03/31/1981 | US4259392 Multilayer magnetic recording medium |
| 03/31/1981 | US4259368 Manufacture of acicular magnetic iron oxide |
| 03/25/1981 | EP0025636A2 Perpetuation of information in magnetically recorded medium |
| 03/25/1981 | EP0025606A1 Apparatus for compensation of overshoot, undershoot and delay in response to step signals in a system comprising a reactive filter network |
| 03/25/1981 | EP0025536A1 Circuit arrangement for multiple-track recording of digital signals on magnetic record carriers |
| 03/25/1981 | EP0025533A1 Arrangement for the both-sided stroke limitation of a body moving to-and-fro |
| 03/24/1981 | US4258401 Multi-channel record/playback magnetic head |
| 03/24/1981 | US4258400 Platform having at least one transducer for reading from and/or recording on a data carrier |
| 03/24/1981 | US4258398 Apparatus for preventing flutter and skew in electrical signals |
| 03/24/1981 | US4258397 Automatic recording level controlling circuit |
| 03/24/1981 | US4258282 Device for the generation of a control voltage across a piezo-electric positioning element |
| 03/24/1981 | CA1098207A1 Ball bearing cam assembly |
| 03/24/1981 | CA1098198A1 Production control apparatus |
| 03/19/1981 | WO1981000782A1 High capacity data cartridge system |
| 03/19/1981 | WO1981000781A1 Head positioning mechanism for data cartridge recorder |
| 03/19/1981 | WO1981000780A1 Composite magnetic head with multitrack support structure |
| 03/18/1981 | EP0025277A2 Record disc of video and audio information for stop-motion playback and methods and apparatus for making and playing such a record disc |
| 03/18/1981 | EP0025160A1 Process for coating flexible supports with magnetic dispersions containing a binder |
| 03/17/1981 | US4257074 Time optimal function generator for disk file magnetic recording head servo position control loop |
| 03/17/1981 | US4257073 Quasi-vertical synchronizing signal generator |
| 03/17/1981 | US4256852 Vinyl acetate-vinyl chloride copolymer, polyisocyanate |
| 03/17/1981 | US4256781 Recording on a track using a magnetic tape head; catalytically toning; electroless plating a conductive layer |
| 03/17/1981 | CA1097805A1 Disk file access method using sample position signal |
| 03/17/1981 | CA1097804A1 Head support and eject mechanism for recording and/or playback apparatus |
| 03/17/1981 | CA1097803A1 Magneto-resistive reading head with suppression of thermal noise |
| 03/17/1981 | CA1097750A1 Dual channel signal detector circuit |
| 03/11/1981 | EP0024858A2 Video record disc and playback apparatus and method for it |
| 03/11/1981 | EP0024800A1 Security document and system |
| 03/11/1981 | EP0024765A1 Tape recording or reproducing apparatus with rotating magnetic head |
| 03/11/1981 | EP0024694A2 Process for preparing ferromagnetic acicular iron particles, and their use |
| 03/11/1981 | EP0024693A2 Process for the preparation of acicular ferrimagnetic iron oxide, and its application |
| 03/11/1981 | EP0024692A2 Process for preparing acicular ferromagnetic iron particles, and their use |
| 03/11/1981 | EP0024563A1 Head support assembly for a floppy disk drive unit |
| 03/11/1981 | EP0024390A1 Noise reduction apparatus |
| 03/10/1981 | US4255772 Read/write magnetic head assembly with magnetoresistive sensor |
| 03/10/1981 | US4255771 Video signal reproducing apparatus |
| 03/10/1981 | US4255768 Tracking control apparatus for a rotary head, variable speed signal reproducing system |
| 03/10/1981 | US4255492 Magnetic recording crystals, process for producing same, and magnetic recording webs using same |
| 03/10/1981 | US4255409 Oxidizing a ferrous compound with an alkali metal chlorate |
| 03/10/1981 | US4254585 Process and apparatus for the surface treatment of flexible magnetic recording media |
| 03/10/1981 | CA1097434A1 Semiconductor etching process |
| 03/10/1981 | CA1097057A1 Cobalt-doped acicular hyper-magnetite particles |
| 03/05/1981 | WO1981000639A1 Unit of rotatable magnetic heads |
| 03/03/1981 | US4254440 Magnetic tape head alignment |
| 03/03/1981 | US4253886 Corrosion resistant ferromagnetic metal powders and method of preparing the same |
| 03/03/1981 | CA1096968A1 Method and apparatus for fabrication of magnetic recording media |
| 03/03/1981 | CA1096967A1 Positionable transducer mounting structure and driving system therefor |
| 02/24/1981 | US4253127 Magnetic head |
| 02/24/1981 | US4253125 Head loading and unloading mechanism for magnetic flexible disk |
| 02/24/1981 | US4253122 Automatic adjustment of biasing current for recording sound by three-head type tape-recorder |
| 02/24/1981 | US4251910 Method of making multitrack magnetic heads |
| 02/19/1981 | WO1981000479A1 Media wear distribution means |
| 02/17/1981 | US4251882 Method and apparatus for measuring the electroacoustic properties of magnetic tapes |
| 02/17/1981 | US4251842 Magnetic recording and reproducing device |
| 02/17/1981 | US4251841 Magnetic head slider assembly |
| 02/17/1981 | US4251840 Rotary head assembly for magnetic recording and reproducing device |
| 02/17/1981 | US4251839 Floating head device |
| 02/17/1981 | US4251838 Auto-tracking control system for use in apparatus for reproducing a video signal recorded in successive parallel tracks on a recording medium |
| 02/17/1981 | US4251504 Addition of alkali hydroxide to an aqueous salt solution; removal of some supernatant from precipitate; oxidation |
| 02/17/1981 | US4251297 Heating permalloy and boron carbide |
| 02/17/1981 | CA1096037A1 Dynamic deskewing for a rotating head recording device |
| 02/17/1981 | CA1096036A1 Dynamic transducer biasing signal amplifying circuitry |
| 02/11/1981 | EP0023565A1 Arrangement for track-dependent position control in a system for recording and/or reproducing information on a magnetic recording disc, particularly of the flexible type and a magnetic recording disc therefor |
| 02/10/1981 | US4250530 Fixed and movable supporting of dual magnetic heads |
| 02/10/1981 | US4250225 Process for the production of a magnetic recording medium |
| 02/10/1981 | US4249301 Erosion of ferrite and masking material |
| 02/04/1981 | EP0023390A1 Magnetic head arrangement |
| 02/04/1981 | EP0023328A1 Metallic thin film magnetic recording medium |
| 02/04/1981 | EP0023265A1 Finely divided solids, their preparation and use |
| 02/03/1981 | US4249222 Recording and/or reproducing apparatus for reducing tape vibration |
| 02/03/1981 | US4249219 Current drive circuit for an induction coil |
| 02/03/1981 | US4248907 Process for preparing magnetic powder |
| 02/03/1981 | CA1094779A1 Process for treating chromium dioxide |