| 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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| 10/18/1977 | US4054758 Mounting of pickup stylus |
| 10/18/1977 | US4054291 Turntable assembly for phonograph records |
| 10/11/1977 | US4053161 Stylus arm lifting/lowering apparatus for a video disc player |
| 10/04/1977 | US4052743 Transducer carriage transport having cylindrical bearings and a grooved guide member |
| 10/04/1977 | US4052738 Stylus for capacitive videodisc |
| 09/27/1977 | US4050699 Quick replay device |
| 09/20/1977 | US4049280 Pickup cartridge |
| 09/20/1977 | US4049279 Control devices for pick-up arms of record players |
| 09/06/1977 | US4046386 Control device |
| 09/06/1977 | US4046385 Record players |
| 09/06/1977 | US4046384 Stylus cleaning system for disc record player |
| 08/30/1977 | US4045621 Recording system for a multichannel record disc |
| 08/23/1977 | US4044379 Method and apparatus for electromechanical recording of short wavelength modulation in a metal master |
| 08/23/1977 | US4042999 Miniaturized vacuum cleaner device |
| 08/16/1977 | USRE29360 Or reproducing four channel signals on a record disc |
| 08/09/1977 | US4040635 Releasable stylus arm magnetic coupling |
| 08/09/1977 | US4040634 Overhead disc record grounding apparatus |
| 08/02/1977 | US4040106 Flexible magnetic disc drive apparatus |
| 08/02/1977 | US4039195 Pickup arm driving device in linear tracking pickup apparatus |
| 08/02/1977 | US4039194 Automatic record player |
| 07/26/1977 | US4038682 Video disc player apparatus for establishing electrical connection between a stylus electrode and a signal processing circuit |
| 07/26/1977 | US4038009 Apparatus for the manufacture of disc records |
| 07/12/1977 | US4035590 Apparatus for electromechanical recording of short wavelength modulation in a metal master |
| 07/05/1977 | US4033592 Record disc cutting stylus |
| 07/05/1977 | US4033591 Pick-up arm rotary pivot bearing structure |
| 06/28/1977 | US4032971 Video player having safety devices actuated by unlatching |
| 06/21/1977 | US4031546 Disc player and stylus therefor |
| 06/21/1977 | US4031335 Stereo pick-up with casing serving as common pole piece |
| 06/21/1977 | US4030835 Defect detection system |
| 06/14/1977 | US4030124 Video disc playback system and pickup cartridge therefor |
| 06/14/1977 | US4030123 Stylus adjustment apparatus for a video disc player |
| 06/14/1977 | US4029322 Pickup arm assembly |
| 06/07/1977 | US4027887 Toy phonograph with automatic pickup arm return means |
| 05/17/1977 | US4023677 Cleaning devices for records and pickup styli |
| 05/10/1977 | US4023130 Pivoted arm control arrangements |
| 04/19/1977 | US4018984 Video disc record having spirally aligned sync storage locations |
| 04/12/1977 | US4017678 End-of-play control system |
| 04/05/1977 | USRE29171 Multi-directional sound system |
| 04/05/1977 | US4016374 Multichannel record disc recording system with signal level control |
| 04/05/1977 | US4016373 Multichannel record disc recording system |
| 03/15/1977 | US4012047 Automatic record changer |
| 03/08/1977 | US4010959 Sound reproducing unit |
| 03/01/1977 | US4010492 Using a radio feedback link to the engineer |
| 03/01/1977 | US4010333 Record disc recording system with a distortion signal |
| 03/01/1977 | US4009885 Stereo phonograph pick-up cartridge |
| 02/15/1977 | US4008381 Multichannel record disc recording system |
| 02/15/1977 | US4007939 Mechanism for supporting pickup arm in disc record player of linear tracking arm type |
| 02/01/1977 | US4005965 Record producing apparatus |
| 01/25/1977 | US4004817 Tone arm assembly in record player |
| 01/25/1977 | US4004816 Programmer for record player |
| 01/25/1977 | US4004815 Miniature toy sound-reproducing device |
| 01/18/1977 | US4004080 Metal coating for video discs |
| 01/11/1977 | USRE29113 Triangular piezoelectric transducer for recording video information |
| 12/21/1976 | US3998989 Trifluorochloroethylene-vinyl chloride copolymer, tetrafluoroethylene telomer |
| 12/14/1976 | US3997716 Disc record locked groove escape apparatus |
| 12/14/1976 | US3997174 Turntable mat |
| 12/14/1976 | US3997173 Inside force cancelling device for tone arm of record player |
| 11/23/1976 | US3993316 Overhead signal pickup device |
| 11/23/1976 | US3993315 Automatic phonographs |
| 11/16/1976 | US3992590 Matrix amplifying circuit |
| 11/16/1976 | US3992018 Method and apparatus for use in cleaning a gramophone disc |
| 11/16/1976 | US3992017 Pickup cartridge |
| 11/16/1976 | US3992016 Simplified phonograph |
| 11/09/1976 | US3991284 Gramaphone pickup |
| 11/02/1976 | US3989903 Multi-directional sound signal recording and/or reproducing system with crosstalk compensation means |
| 09/28/1976 | US3983334 Matrix and equalizer circuit with gain control |
| 09/07/1976 | US3979588 Light projecting and absorbing apparatus in a system for selecting automatically desired music in phonographic player |
| 09/07/1976 | US3979564 4-Channel stereo recording and reproducing method |
| 09/07/1976 | US3979127 Record players |
| 08/24/1976 | US3976830 Apparatus and method for embossing information on a disc |
| 08/17/1976 | US3975321 Sound reproduction compositions |
| 08/10/1976 | US3973777 Cueing control |
| 08/10/1976 | US3973361 Stylus grinding device for video disc player |
| 08/10/1976 | US3973325 Record grooving device |
| 08/03/1976 | US3973080 Playback device for a disc-shaped record carrier with transducer lifting for changing playback groove for fast, slow or stop effects |
| 08/03/1976 | US3972534 Device for continuous adjustment of the stylus pressure |
| 08/03/1976 | US3972533 Signal pickup lifting/lowering apparatus |
| 07/06/1976 | US3968326 Trapezoidal smooth grooves for video disc |
| 06/29/1976 | US3966216 Cartridge assembly for record player tone arm |
| 06/29/1976 | US3965520 Brush and cleaning composition for phonograph records |
| 06/22/1976 | US3964751 Phonograph cartridge replaceable stylus assembly |
| 06/15/1976 | US3963864 Pickup arm assembly |
| 06/15/1976 | US3963246 Tone arm for record player |
| 06/15/1976 | US3963245 Apparatus for automatically returning a pick-up arm in a record player |
| 06/08/1976 | US3961797 Vacuum deposited beryllium on aluminium pipe |
| 06/08/1976 | US3961656 Phonograph record insulator |
| 06/01/1976 | US3961131 Disc record locked groove escape apparatus |
| 06/01/1976 | US3960790 Disc record and method of compounding disc record composition |
| 05/25/1976 | US3958292 Roller for cleaning phonograph records |
| 05/18/1976 | US3957917 Resin composition for shaping information carrier |
| 05/18/1976 | US3957273 Stylus holder |
| 05/18/1976 | US3957272 Cartridge shell for phonograph pickup |
| 05/11/1976 | US3956581 Pickup arm apparatus |
| 05/11/1976 | US3956075 Fabrication of foil disc pressing matrices |
| 05/04/1976 | US3954637 Method and composition for lubricating and lubricated substrates |
| 05/04/1976 | US3954273 Phonograph pickup cartridge |
| 05/04/1976 | US3954272 Signal pickup return mechanism |
| 04/27/1976 | US3953036 Method of and apparatus for reproducing recorded information |
| 04/20/1976 | US3952170 Miniature apparatus for reproducing sound from a stationary record |
| 04/20/1976 | US3952147 Pickup arm cartridge |