| Patents for G11B 3 - Recording by mechanical cutting, deforming or pressing, e.g. of grooves or pits; Reproducing by mechanical sensing; Record carriers therefor (2,921) |
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| 04/22/1980 | US4199782 Stylus for reproducing capacitive videodisc |
| 04/22/1980 | US4199375 By embedding in self-supporting films of polyvinyl alcohol |
| 04/22/1980 | US4199150 Nipper type record cleaner |
| 04/22/1980 | US4199149 Record player |
| 04/22/1980 | US4199148 Automatic record player |
| 04/22/1980 | CA1076256A1 Stylus arm lifting/lowering apparatus for a video disc player |
| 04/15/1980 | US4198663 Digital signal recording system |
| 04/15/1980 | US4198658 Recording/playback apparatus facilitating track skip detection |
| 04/15/1980 | US4198061 Electrostatic-vacuum record cleaning apparatus |
| 04/15/1980 | US4198060 Wiping apparatus and method for a high-density information record |
| 04/15/1980 | US4198059 Method and means for playing back or moving of records or tapes substantially free of electrostatic charges |
| 04/15/1980 | US4198058 Pick-up with exchangeable stylus |
| 04/15/1980 | US4198057 Simplified record player |
| 04/15/1980 | US4198056 Protective device for record player |
| 04/15/1980 | CA1075810A1 Video disc stylus |
| 04/08/1980 | US4197011 Defect detection and plotting system |
| 04/01/1980 | US4196379 Pickup arm control system in record player or the like |
| 04/01/1980 | US4195847 Cleaning device for phonograph records |
| 04/01/1980 | US4195845 Turntable rotation controlling apparatus |
| 04/01/1980 | US4195844 Audiovisual card reproducing device |
| 04/01/1980 | US4195843 Simplified motor assembly and related electrical connection in a _sound reproducing device |
| 04/01/1980 | CA1074706A1 Stylus vibrating mechanism in pickup cartridge |
| 04/01/1980 | CA1074705A1 Disc-record player with improved anti-skating device |
| 03/25/1980 | US4194744 Natural rubber, butyl rubber |
| 03/25/1980 | US4194464 Record care pad |
| 03/19/1980 | EP0008740A1 Method for detecting retriable errors and apparatus for reorienting a transducer in a data storage system |
| 03/19/1980 | EP0008598A1 Cleaning and lubricating compositions |
| 03/18/1980 | US4194094 Device for mechanically recording a signal having a bandwidth of several MHz, particularly for a video disc |
| 03/18/1980 | CA1073820A1 System for reducing noise transients in recorded sound signals |
| 03/11/1980 | US4192514 Sound reproducing mechanism for toys |
| 03/05/1980 | EP0008543A1 Method for moulding a videodisc composition |
| 03/04/1980 | US4191382 Turntable rotation control device |
| 02/20/1980 | EP0008209A1 Composition for cleaning and surface treatment of phonograph records and similar objects and its use |
| 02/19/1980 | CA1072209A1 End of play circuit |
| 02/05/1980 | CA1071111A1 Microphonograph record with alignment means |
| 02/05/1980 | CA1071110A1 Tone arm assembly with vibration control |
| 01/29/1980 | US4186229 Method of manufacturing base plates suitable for pressing records and plates manufactured by the same |
| 01/29/1980 | US4185836 Disc record player |
| 01/29/1980 | US4185835 Gramophone pick-up arms |
| 01/22/1980 | US4184688 Tone arm assembly |
| 01/22/1980 | US4184687 Electrical control system for the movement of the pickup arm of a disc-record player |
| 01/22/1980 | CA1070261A1 Process for producing a stamper for videodisc purposes |
| 01/15/1980 | US4183819 Solution and method for cleaning, polishing and lubricating magnetic heads |
| 01/15/1980 | US4183538 Automatic record playing apparatus |
| 01/15/1980 | US4183537 Lateral pressure detector for use with a phonograph record player |
| 01/08/1980 | US4183069 Support apparatus for a flexible disc and disc reader using this support apparatus |
| 01/08/1980 | US4183059 Track skipper for a video disc player |
| 01/08/1980 | US4182517 Articulated parallelogram phonograph tonearm |
| 01/08/1980 | CA1069615A1 Head to disc interface adjustment |
| 01/08/1980 | CA1069442A1 Phonograph record player with repeat control |
| 01/01/1980 | CA1069213A Mold for use in making a video disc |
| 01/01/1980 | CA1069212A Pickup arm cartridge apparatus |
| 01/01/1980 | CA1069211A Turntable speed lock system |
| 01/01/1980 | CA1069057A Mounting of pickup stylus |
| 01/01/1980 | CA1069056A Disc record player with improved anti-skating device |
| 12/25/1979 | US4180840 Cleaning disk assembly for oppositely-oriented, dual-component magnetic transducers |
| 12/18/1979 | CA1068220A1 Inertial phonograph device |
| 12/11/1979 | US4178489 Suspension system for disc recording cutter head |
| 12/04/1979 | US4176847 Device for preventing slipping of turntable out of shaft |
| 11/27/1979 | US4176378 Signal pickup arm lifting/lowering and groove skipper apparatus |
| 11/27/1979 | US4176104 Alkylenebisalkylamide lubricity modifier |
| 11/27/1979 | US4175751 Toggle mechanism for video disc player |
| 11/20/1979 | US4174841 Record player with start-stop control by means of a magnetic field |
| 11/20/1979 | CA1066631A1 Pickup arm device dynamically balanced |
| 11/13/1979 | CA1066411A1 Video disc and method of making the same |
| 10/30/1979 | CA1065485A1 Record disk and method for producing the same |
| 10/23/1979 | US4171817 Control device for controlling the movement of pickup arm of record player or the like |
| 10/17/1979 | EP0004738A1 Video disc player |
| 10/16/1979 | US4171136 Reproducing apparatus for a disk-shaped recording medium |
| 10/09/1979 | US4170362 Bearing arrangement for a record player tonearm |
| 10/09/1979 | US4170361 Bearing arrangement for a record player tonearm |
| 10/09/1979 | US4170360 Apparatus for adjusting the position of an arm in a record playing device, such as a phonograph or the like |
| 10/02/1979 | CA1063726A1 Playback system signal pickup return mechanism |
| 10/02/1979 | CA1063520A1 Disc record locked groove skipper |
| 09/25/1979 | US4169276 Drive circuit for controlling a movable magnetic head |
| 09/19/1979 | EP0004158A1 Pick-up |
| 09/18/1979 | CA1062621A1 Phonograph record player with automatic repeat mode |
| 09/11/1979 | CA1062371A1 Stylus grinding device for video disc player |
| 09/04/1979 | US4167026 Information reproducing and recording apparatus for recording on tape from a phonograph record |
| 09/04/1979 | US4166626 Record cleaner |
| 09/04/1979 | US4166625 Automatic stop for turntable tone arm |
| 09/04/1979 | US4166624 Record player |
| 09/04/1979 | US4166623 Pickup needle cleaning device for record disc playback apparatus |
| 09/04/1979 | US4166621 Programmable record changer |
| 08/28/1979 | US4165560 Method for manufacturing a diamond stylus for video disc players |
| 08/28/1979 | CA1061372A1 Method of separating a label from an adjacent label in a stack of pilant grammophone record labels in an automatic, repeated operation and apparatus for bringing the method into practice |
| 08/28/1979 | CA1061258A1 Phonograph pick-up arm |
| 08/23/1979 | WO1979000603A1 Alleviating the effects of static charge on gramophone records |
| 08/21/1979 | US4165078 Flip-up stylus protector for a phonograph cartridge |
| 08/14/1979 | US4164756 Disc record groove skipper |
| 08/14/1979 | US4164755 Video disc pickup apparatus |
| 08/14/1979 | US4164353 Toy phonograph apparatus |
| 08/14/1979 | US4164075 Phonograph record eccentricity tester |
| 07/31/1979 | US4162552 Cleaning device for circular discs |
| 07/31/1979 | CA1059620A1 Apparatus for reading a disk-shaped record carrier to be placed on a turntable |
| 07/24/1979 | US4162511 Velocity correction system for video disc player |
| 07/24/1979 | US4162510 Keel-tipped stylus for video disc systems |
| 07/24/1979 | US4162076 Tone arm |
| 07/24/1979 | CA1059035A1 Miniature apparatus for reproducing sound from a stationary record |
| 07/17/1979 | CA1058751A1 Video disc playback apparatus and stylus therefor |