| 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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| 02/17/1981 | CA1095837A1 Groove disk playback stylus |
| 02/10/1981 | US4249746 Tracking control for a video disc player |
| 02/10/1981 | CA1095619A1 Defect detection system |
| 02/04/1981 | EP0023224A1 Device for playing record player |
| 02/03/1981 | US4248438 Mechanical record cutting method |
| 02/03/1981 | US4247976 Method for production of a turntable with stroboscope marks |
| 01/27/1981 | US4247120 Sound recording |
| 01/27/1981 | US4247118 Record players |
| 01/22/1981 | WO1981000164A1 Phonograph tone arm system |
| 01/22/1981 | WO1981000163A1 Phonograph tone arm control system |
| 01/20/1981 | CA1094043A1 Lubricants comprising dialkanolamine derivatives |
| 01/13/1981 | US4244587 Apparatus for cleaning records |
| 01/07/1981 | EP0020843A1 Pick-up stylus for gramophone |
| 12/30/1980 | US4241926 Tone arm assembly |
| 12/23/1980 | US4241366 Magnetic head loading apparatus |
| 12/23/1980 | US4240641 Record player |
| 12/23/1980 | CA1092290A1 Plastics foil for the manufacture of audio-visual information carriers |
| 12/16/1980 | US4239239 Phonograph tone arm system |
| 12/11/1980 | WO1980002770A1 Device for moving tone arm |
| 12/10/1980 | EP0019729A1 Cleaning device for sensitive surfaces of solid bodies |
| 12/09/1980 | US4238030 Electrically conductive cover sheath for dielectric record discs and the like |
| 11/25/1980 | US4235136 Trimming disc records |
| 11/18/1980 | US4234836 Phonograph turntable control system |
| 11/18/1980 | US4234394 Method for producing an information carrier disc |
| 11/18/1980 | US4234194 Stylus lead-in mechanism of record player |
| 11/18/1980 | US4234193 Simplified phonograph capable of selecting desired grooves on a record disc |
| 11/18/1980 | CA1089983A1 Video record player system |
| 11/11/1980 | US4233261 Method and device for manufacturing information carriers |
| 11/11/1980 | US4232871 Manual record cleaner |
| 11/11/1980 | US4232868 Stationary record player |
| 11/11/1980 | CA1089564A1 Information signal recording disc |
| 11/04/1980 | US4232202 Record player for a stationary record disc |
| 11/04/1980 | US4232072 Protective compositions for recording |
| 11/04/1980 | CA1088873A1 Apparatus for adjusting the position of an arm in a record playing device such as a phonograph or the like |
| 11/04/1980 | CA1088708A1 Method of manufacturing base plates suitable for pressing records and plates manufactured by the same |
| 10/29/1980 | EP0018210A1 Moulding apparatus for record discs |
| 10/28/1980 | US4230323 Automatic record player |
| 10/21/1980 | CA1087992A1 Record player switch-off mechanism |
| 10/14/1980 | US4227699 Manual scanning mechanism for video disc player |
| 10/14/1980 | CA1087730A1 Spring loaded pickup arm for video disc playback |
| 10/07/1980 | US4226425 Nonrecorded section detection in an automatic record |
| 10/07/1980 | CA1087308A1 Pickup arm lifting/lowering apparatus for a disc record player |
| 10/07/1980 | CA1087307A1 Pickup cartridge |
| 09/30/1980 | US4225142 Turntable system with low aggregate resonance |
| 09/30/1980 | US4225141 Mechanism for aiding carriage return in video disc player |
| 09/30/1980 | CA1086860A1 Video player having safety devices actuated by unlatching |
| 09/23/1980 | CA1086424A1 Video disc playback system and pickup cartridge therefor |
| 09/16/1980 | US4223242 Method and circuit for driving a piezoelectric transducer |
| 09/16/1980 | US4222574 Radial-tracking programmable record player |
| 09/02/1980 | US4220926 Noise detector employing plural delay circuits |
| 09/02/1980 | US4220341 Pickup |
| 09/02/1980 | US4220340 Constant drag carriage translating mechanism for video disc player |
| 09/02/1980 | US4220339 Caddy-actuated declutching mechanism for video disc player |
| 08/26/1980 | US4219321 Device for making discs |
| 08/26/1980 | CA1084419A1 Playback stylus for phonograph record stamper |
| 08/19/1980 | CA1083973A1 Bearing arrangement for a record player tonearm |
| 08/12/1980 | US4216970 Long chain alkyl-terminated disiloxane or trisiloxane |
| 08/06/1980 | EP0014048A1 Phonograph |
| 08/05/1980 | US4216357 Optical play-back system for recorded signals with oscillating beam |
| 07/29/1980 | US4214757 Tone arm assembly |
| 07/29/1980 | US4214756 Record player |
| 07/29/1980 | CA1082605A1 Record player with linearly moving reproducing stylus |
| 07/23/1980 | EP0013522A1 Method and apparatus for the manufacture of flexible record discs |
| 07/23/1980 | EP0013492A1 Method of producing tubular boron bodies suitable for use as pick-up cantilevers |
| 07/22/1980 | US4213870 Includes fluorinated alkyl esters |
| 07/22/1980 | CA1082358A1 Device for recording or reproducing a video signal |
| 07/15/1980 | US4212838 Vapor deposition of boron or boride on etchable rod or pipe |
| 07/15/1980 | US4212490 Pressing |
| 07/15/1980 | US4212471 Device for cutting a sound groove on a disc recording medium |
| 07/15/1980 | US4212470 Head shell for pick-up arms and method of making same |
| 07/15/1980 | US4212469 Disc record players |
| 07/15/1980 | CA1081669A1 Defect plotting system |
| 07/10/1980 | WO1980001429A1 Play-back stylus for disk |
| 07/10/1980 | WO1980001428A1 Electrodynamic pick-up head |
| 07/08/1980 | US4211422 Damping apparatus for damping the resonance of disc record tone arms |
| 07/01/1980 | CA1080634A1 Record player for stationary disc records |
| 06/24/1980 | US4209809 Apparatus and method for record reorientation following error detection in a data storage subsystem |
| 06/24/1980 | US4209174 Shock starting type simplified phonograph |
| 06/17/1980 | US4208634 Circuit for suppressing noise caused by scratches on a phonograph record |
| 06/10/1980 | US4207463 Rotation angle sensor |
| 06/10/1980 | CA1079202A1 Phonograph tone arm and cartridge damping system |
| 06/03/1980 | US4205855 Sound reproducing apparatus |
| 06/03/1980 | US4205854 Record players |
| 06/03/1980 | CA1078746A1 Reproducing apparatus for a disk-shaped recording medium |
| 05/29/1980 | WO1980001118A1 Device for playing record player |
| 05/28/1980 | EP0011068A1 Turntable for record playing deck |
| 05/27/1980 | US4204687 Tone arm drive device |
| 05/20/1980 | US4203856 Lubricants comprising fluoroalkyl esters |
| 05/20/1980 | US4203606 Pickup arm device |
| 05/14/1980 | EP0010975A1 Gramophone record composition and gramophone records produced therefrom |
| 05/14/1980 | EP0010909A1 Device for cleaning gramophone records |
| 05/13/1980 | US4203134 FM Signal demodulator with defect detection |
| 05/13/1980 | US4202550 Stereo lead wires and arrangements thereof for connecting pick-up device to amplifier |
| 05/13/1980 | US4202549 Device for manually controlling movement of pickup arm in automatic record player |
| 05/13/1980 | US4202071 Apparatus for washing and drying phonograph records |
| 05/13/1980 | CA1077621A1 Video disc player mechanism control system |
| 05/06/1980 | US4201390 Semi-automatic record player |
| 04/30/1980 | EP0010094A1 Alleviating the effects of static charge on gramophone records |
| 04/29/1980 | US4200828 Pivoted arm control arrangement |
| 04/29/1980 | US4200295 Control mechanism for lifting, lowering and swinging record player tonearm |