| 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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| 11/01/1977 | US4056518 Ratchet head tape mover |
| 10/25/1977 | US4055849 Magnetic head positioning and playback apparatus utilizing a split head for self-tracking and selective reproduction |
| 10/18/1977 | US4054929 Tape recording methods and apparatus |
| 10/18/1977 | US4054922 Apparatus for forming an erasable record of the value of a measured quantity |
| 10/18/1977 | US4054643 Manufacture of γ-Fe2 O3 |
| 10/18/1977 | US4054530 Iron-nickel-cobalt magnetic powder and tape prepared therefrom |
| 10/18/1977 | US4054467 Oxidation to form aluminum hydroxyoxide |
| 10/11/1977 | US4053937 Calibration timing bands |
| 10/11/1977 | US4053936 Read and write circuitry |
| 10/11/1977 | US4052798 Audio-visual teaching system |
| 10/04/1977 | US4052749 Thin film magnetic head |
| 10/04/1977 | US4052748 Magnetoresistive magnetic head |
| 10/04/1977 | US4052747 Device for the magnetic domain storage of data having a shift register filled with coded series of domains |
| 10/04/1977 | US4052746 Head assembly for magnetic recorders |
| 10/04/1977 | US4052745 Magnetic head adjustment means for a magnetic tape machine |
| 10/04/1977 | US4052743 Transducer carriage transport having cylindrical bearings and a grooved guide member |
| 10/04/1977 | US4052741 Track seeking and following |
| 10/04/1977 | US4052326 Manufacture of γ-iron(III) oxide |
| 10/04/1977 | US4051735 Linear actuator |
| 09/27/1977 | US4051542 Magnetic head with thin sheet exhibiting magnetoresistive property |
| 09/20/1977 | US4050089 Apparatus for shifting the magnetic tape head in a multitrack tape player |
| 09/20/1977 | US4050088 Apparatus for selecting playback or recording modes in magnetic recording and/or reproducing apparatus |
| 09/20/1977 | US4050086 Dynamic transducer biasing signal amplifying circuitry |
| 09/20/1977 | US4050012 Dual biased static sensing magnetic transducer |
| 09/20/1977 | US4049871 Magnetic recording material |
| 09/20/1977 | US4049566 Dispersing magnetic particles in epoxy resin and acetic, formic, or propionic acid, then adding a polyvinyl acetal resin |
| 09/20/1977 | US4049522 Low coercivity iron-silicon material, shields, and process |
| 09/20/1977 | US4048714 Glass bonding of manganese-zinc ferrite |
| 09/13/1977 | US4048660 Record track following and seeking |
| 09/13/1977 | US4048375 Magnetic recording media of improved mechanical resistance |
| 09/13/1977 | US4048150 Leader of a carrier of information in the form of a web |
| 09/06/1977 | US4047236 Supersensitive magnetoresistive sensor for high density magnetic read head |
| 09/06/1977 | US4047232 Leader tape |
| 09/06/1977 | US4047230 Method and apparatus for transferring magnetic signal from a master sheet to copy sheets |
| 09/06/1977 | US4046950 Chalcogenated tetracene organic metals |
| 09/06/1977 | US4046932 Magnetic recording discs |
| 09/06/1977 | US4045864 Method of manufacturing magnetic heads |
| 08/30/1977 | USRE29380 Recording apparatus for magnetic disks using both sides of the disk |
| 08/30/1977 | US4045544 Process for the preparation of ferromagnetic chromium dioxide |
| 08/30/1977 | US4044509 Method of and device for grinding grooves |
| 08/23/1977 | US4044394 Thin film magnetic head with a center tap |
| 08/23/1977 | US4044392 Process for making a read-while-write tape head and the product made thereby |
| 08/23/1977 | US4044387 Magnetic head switching system |
| 08/23/1977 | US4044231 Secure property document and method of manufacture |
| 08/23/1977 | US4044174 Ultrasonically smoothing a magnetic layer on a web |
| 08/23/1977 | US4043612 Bearing structure |
| 08/23/1977 | US4043297 Device for the magnetic orientation of magnetic recording media |
| 08/16/1977 | US4042382 Temperature-stable non-magnetic alloy |
| 08/09/1977 | US4041539 Tape head shift apparatus for multi-track tape player |
| 08/09/1977 | US4041538 Low noise magnetic transducer preamplifier having flat response |
| 08/09/1977 | US4040174 Method of manufacturing magnetic heads |
| 08/02/1977 | USRE29335 Apparatus for automatically attaching a patch to a commercial document |
| 08/02/1977 | US4040113 Magnetoresistive magnetic head |
| 08/02/1977 | US4040110 Video head assembly having discrete arcurate ceramic pieces on rotor between heads |
| 08/02/1977 | US4040109 Tape transport system of video tape recorder with longitudinal recording |
| 08/02/1977 | US4040103 Shock force compensating system |
| 08/02/1977 | US4040099 Method and apparatus for preparing recorded program material to render detectable unauthorized magnetic tape duplications, and method and apparatus for detecting such duplications |
| 08/02/1977 | US4039826 Magnetic head locating system for disk storage system |
| 07/26/1977 | USRE29326 Integrated magnetic head having alternate conducting and insulating layers within an open loop of two magnetic films |
| 07/26/1977 | US4038692 Tape sensing device for magnetic tape recording and/or reproducing apparatus |
| 07/26/1977 | US4038691 Still image slide combination with sequentially activated audio channels per slide |
| 07/26/1977 | US4038442 Method for coating |
| 07/19/1977 | US4037264 Magnetic head housing with wedge locking means |
| 07/19/1977 | US4037261 Tape recorder with head positioning mechanism |
| 07/19/1977 | US4037259 Method and equipment for switching the operating conditions of a tape-recorder |
| 07/19/1977 | US4037258 Read/write apparatus for magnetic recorders |
| 07/19/1977 | US4036723 RF bias sputtering method for producing insulating films free of surface irregularities |
| 07/12/1977 | US4035739 Signal dynamic compression and expansion circuits |
| 07/12/1977 | US4034613 Disc drive linear actuator and control system therefor |
| 07/05/1977 | US4034414 Magnetic head |
| 07/05/1977 | US4034413 Magnetic head lifting device |
| 07/05/1977 | US4034412 Magnetic transducer apparatus with damped spring action |
| 07/05/1977 | US4034411 Magnetic disk information storage apparatus |
| 07/05/1977 | US4034410 Magnetic recording medium |
| 07/05/1977 | US4034397 Pilot signal luminance correction means for video recording apparatus |
| 07/05/1977 | US4034133 Magnetic recording medium with lubricant |
| 07/05/1977 | US4033891 Magnetic particle powder of acicular ferric oxide used for magnetic recording material and a process for producing the same |
| 07/05/1977 | US4033288 Apparatus for coating magnetic disks |
| 06/28/1977 | US4032985 Video transducer system and method with tape drag between the reel and the capstan |
| 06/28/1977 | US4032984 Transducer positioning system for providing both coarse and fine positioning |
| 06/28/1977 | US4032682 Magnetizable particles in a resinous binder |
| 06/28/1977 | US4031634 Teaching device |
| 06/21/1977 | US4031558 Head drum assembly with electrical noise shield |
| 06/21/1977 | US4031334 Apparatus for magnetic recording and/or reproducing of signals received by one or more signal receiving devices |
| 06/21/1977 | US4030189 Method of making magnetic head devices |
| 06/14/1977 | US4030137 Lead screw support damping mechanism |
| 06/14/1977 | US4030133 Guide drum apparatus for a video tape recorder and/or player |
| 06/14/1977 | US4030132 Dual mode velocity servo control for a linear actuator motor |
| 06/14/1977 | US4030130 Transducer head assembly and apparatus for using same in a plural- track record disk system |
| 06/14/1977 | US4030105 Technique of character generation on magnetic tapes |
| 06/14/1977 | US4029541 Cobalt containing magnetic layer, surface oxidized with nitric acid or ammonium persulfate solution |
| 06/14/1977 | US4029501 Method of preparing improved magnetic head material |
| 06/14/1977 | US4029249 Roller system for continuous transport of webs of sheeting |
| 06/07/1977 | US4028735 Head indexing apparatus for a combined two and four channel tape player/recorder |
| 06/07/1977 | US4028734 Plural magnetic head assembly with independently supporting structure |
| 05/31/1977 | US4027338 Transducer positioning system for providing coarse positioning |
| 05/24/1977 | US4025723 Real time amplitude control of electrical waves |
| 05/24/1977 | US4025379 Method of making laminated magnetic material |
| 05/17/1977 | US4024583 Magnetic head |
| 05/17/1977 | US4024582 Track change-over mechanism for a multi-channel tape |