| Patents for G11B 23 - Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus (25,121) |
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| 11/01/1977 | US4056834 Magnetic video recorder and cassette providing tape loading |
| 11/01/1977 | US4056245 Magnetic tape cartridge |
| 11/01/1977 | US4056244 Tape clamping device for tape-containing cassettes |
| 10/25/1977 | US4055849 Magnetic head positioning and playback apparatus utilizing a split head for self-tracking and selective reproduction |
| 10/25/1977 | US4055372 Storage receptacle for magnetic tape cassette |
| 10/18/1977 | US4054925 Endless loop recorder having temperature compensated tensioning |
| 10/18/1977 | US4054923 Belt driven tape transport with re-positioned reel |
| 10/18/1977 | US4054344 Storage receptacle for magnetic tape cassette |
| 10/18/1977 | US4054252 Magnetic tape cassette |
| 10/18/1977 | US4054206 Cassette case |
| 10/11/1977 | US4053935 Tape cassette with flexible aperture closure |
| 10/11/1977 | US4053121 Tape guiding and tension controlling cassette assembly |
| 10/04/1977 | US4052750 Flexible recording disk with improved spindle mounting means |
| 10/04/1977 | US4052113 Tape cassette holder for vehicular use |
| 10/04/1977 | US4052020 Computer tape reel |
| 09/20/1977 | US4050087 Or reproducing apparatus |
| 09/20/1977 | US4049119 Tape cassette filing unit |
| 09/06/1977 | US4047232 Leader tape |
| 09/06/1977 | US4046255 Container for standard magnetic tape cassette |
| 08/30/1977 | US4045821 Tape cartridge having a shutter with self locking function |
| 08/30/1977 | US4044965 Magnetic tape reel for computer |
| 08/23/1977 | US4044386 Tape cassette with erase inhibit plug |
| 08/23/1977 | US4044233 End predictor for cassette tape |
| 08/23/1977 | US4044207 Apparatus for reproducing a multiple track photographic sound record |
| 08/16/1977 | US4042189 Tape leader characterized by differential bending stiffness |
| 08/09/1977 | US4041537 Tape cassette with locking sensor slide |
| 08/09/1977 | US4040518 Storage and carrying case for compact cassettes |
| 07/26/1977 | US4038693 Anti-static magnetic record disk assembly |
| 07/26/1977 | US4038663 Method of writing information with a modulated radiation beam onto an information storage medium and information storage medium particularly adapted to the method |
| 07/26/1977 | US4037803 Center feed unwinder |
| 07/19/1977 | US4035899 Automatic tape cassette-assembling system |
| 07/12/1977 | US4034927 Continuous loop tape cartridge |
| 06/28/1977 | US4032987 Sound recording and reproducing apparatus using a cassette having a casing made of reflective material |
| 06/28/1977 | US4032985 Video transducer system and method with tape drag between the reel and the capstan |
| 06/21/1977 | US4031558 Head drum assembly with electrical noise shield |
| 06/21/1977 | US4030835 Defect detection system |
| 06/21/1977 | US4030685 Magnetic tape magazine |
| 06/21/1977 | US4030601 Holders for tape cassettes |
| 06/14/1977 | US4030138 Record protection system |
| 06/14/1977 | US4030129 Pulse code modulated digital audio system |
| 06/14/1977 | US4030127 Audio tape player driver information device |
| 06/14/1977 | US4029268 Tape recorder and magnetic tape cassette |
| 06/07/1977 | US4027832 Leader-pin |
| 05/31/1977 | US4026615 Container for magnetic tape cassette |
| 05/31/1977 | US4026489 Quick threading magnetic tape reel |
| 05/24/1977 | US4024954 Apparatus for blocking a cassette in a storage magazine |
| 05/17/1977 | US4023745 Endless tape cartridge |
| 05/10/1977 | US4022986 Playback unit for a long-playing record of a time division multiplexed audio signal |
| 05/10/1977 | US4022402 Container for magnetic tape |
| 05/10/1977 | US4022401 Tape cassette |
| 05/10/1977 | US4022397 8-Track cartridge |
| 05/10/1977 | US4022395 Tape cassette |
| 05/10/1977 | US4022368 Tape cartridge having enhanced tape drive facilities |
| 05/10/1977 | US4022322 Container for a record carrier |
| 05/10/1977 | US4021932 Audiovisual device |
| 05/03/1977 | US4021855 Cassette detection device for recording and/or playback apparatus |
| 05/03/1977 | US4021852 Signal defect compensation |
| 05/03/1977 | US4021006 Container for magnetic tape |
| 05/03/1977 | US4020999 Endless loop cartridge for video |
| 04/26/1977 | US4020503 Still image slide with sound track control |
| 04/26/1977 | US4019695 Tape cartridge with movable guide member |
| 04/19/1977 | US4019203 Filters for tape recording systems |
| 04/19/1977 | US4018947 Method for edge marking recordable webs |
| 04/19/1977 | US4018945 Glow discharging in air |
| 04/19/1977 | US4018398 Winding hub for a record carrier in the form of a tape |
| 04/12/1977 | US4017901 Device for loading and unloading cartridges into and from a recording and/or playback apparatus |
| 04/12/1977 | US4017677 Squelch circuit for a video record player |
| 04/05/1977 | US4016602 Cartridge for endless magnetic-tape loop and device for recording and/or reading thereof |
| 04/05/1977 | US4015790 Tape cartridge |
| 04/05/1977 | US4015789 Reversible cartridge tape player system with side drive |
| 03/22/1977 | US4014042 Tape recorder and magnetic tape cassette |
| 03/22/1977 | US4013239 Continuous loop tape cassette |
| 03/22/1977 | US4013169 Magnet ring configuration and disc cartridge including magnet ring configuration |
| 03/15/1977 | US4012782 Read-only integrated magnetic head |
| 03/15/1977 | US4012233 Conveyor for containers for carrying objects of glass or similar materials, which objects are to be hardened chemically by surface treatment |
| 03/15/1977 | US4012011 Tape cassette |
| 03/15/1977 | US4012006 Continuous loop tape cartridges |
| 03/15/1977 | US4011940 Hinged storage container for tape cartridge with self-aligning walls |
| 03/08/1977 | US4011593 Magnetic tape cassette with screening shield |
| 03/08/1977 | US4011592 Cassette tape recorder with tape pad |
| 03/08/1977 | US4011416 Multiple color light frequencies switched audio modulation |
| 03/08/1977 | US4010514 Arrangement for continuously cleaning flexible layer substrates in tape form |
| 03/01/1977 | US4010491 Automatically retractable tape in sound-slide means |
| 03/01/1977 | US4009781 Slide tray and tape cassette container |
| 02/15/1977 | US4008493 Magnetic head structure with minimum feedthrough |
| 02/15/1977 | US4008492 Thermally stabilized enclosure for magnetic disk |
| 02/15/1977 | US4008489 Portable video tape recorder |
| 02/08/1977 | US4007295 Sulfur dioxide |
| 02/08/1977 | US4006507 Device for conveying a card used for a card reader |
| 02/01/1977 | US4006493 Tape cassette |
| 02/01/1977 | US4006292 Information recording and reproducing system with plural information tracks within a single groove |
| 01/25/1977 | US4004752 Tape cassette |
| 01/25/1977 | US4004689 Article carrier |
| 01/25/1977 | US4004317 Mounting for sapphire bladed tool |
| 01/25/1977 | US4004314 Magnetic tape cleaning device |
| 01/18/1977 | US4004293 Tape player preamplifier circuit responsive to tape speed |
| 01/18/1977 | US4003468 Case and insert for differently sized magnetic tape enclosures |
| 01/11/1977 | US4002355 Book with sound track and visual display |
| 01/11/1977 | US4002238 Magnetic tape cartridge with removable spool |
| 01/04/1977 | US4001892 Contaminant trapping in rotating disk devices |