| 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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| 03/06/1979 | CA1050164A1 Tape pressure pad for cassette tape recorder |
| 03/06/1979 | CA1050066A1 Tape cartridge having a shutter with self-locking function |
| 02/27/1979 | US4142210 Rotatable record carrier and method and apparatus for producing same |
| 02/27/1979 | US4142208 System for automatically correcting the duty factor of the carrier wave arising from reading-out a data carrier |
| 02/27/1979 | US4141731 Method of creating a replicating matrix |
| 02/27/1979 | US4141446 Tape cassettes storage and display |
| 02/22/1979 | WO1979000075A1 Cleaning and lubricating compositions |
| 02/21/1979 | EP0000712A1 Method and device for presenting a cassette with an endless web |
| 02/20/1979 | US4141045 Random selection control system for recording tape cartridges |
| 02/20/1979 | US4140219 Protective storage case for tape cassettes |
| 02/13/1979 | US4139873 Method and apparatus for video signal recording |
| 02/13/1979 | US4139825 Audio frequency amplifier |
| 02/13/1979 | US4139168 Tape cassette |
| 02/13/1979 | CA1048631A1 Squelch circuit |
| 02/13/1979 | CA1048470A1 Stackable winding cores for magnetic tapes |
| 02/06/1979 | US4138703 Video disc package |
| 02/06/1979 | US4138700 Container for using a miniaturized cartridge in an eight-track player |
| 01/30/1979 | US4137430 System for recording a signal with tracing and tracking distortion compensation on a record disc |
| 01/30/1979 | US4136843 Tape cassette having reel locking means therein |
| 01/30/1979 | US4136838 Machine for winding magnetic tapes onto cassettes |
| 01/23/1979 | US4135316 Tape cassettes having indications for blind use |
| 01/23/1979 | CA1046999A1 Storage receptacle for magnetic tape cassette |
| 01/16/1979 | US4135219 Demagnetizer for a magnetic head of a recording-reproducing device |
| 01/16/1979 | US4135215 Video recording format for increasing track-to-track correlation |
| 01/16/1979 | US4134693 Resilient ribbon cartridges for business machines |
| 01/16/1979 | US4134170 Cartridge tape cleaning device |
| 01/09/1979 | US4134144 Cartridge for multi-disk pack |
| 01/02/1979 | US4133010 Sound recording apparatus |
| 01/02/1979 | US4132954 Noise suppression circuit adapted for use with bifilar windings |
| 01/02/1979 | CA1045714A1 Multi-track magnetic head |
| 01/02/1979 | CA1045608A1 Reel for computer magnetic tape |
| 01/02/1979 | CA1045607A1 Tape cassette |
| 01/02/1979 | CA1045601A1 Automatic cassette loading machine |
| 12/26/1978 | US4131926 Magnetic tape and recording method therefor |
| 12/26/1978 | US4131925 Edge guide for cooperation with a coaxial reel cassette |
| 12/26/1978 | US4131305 Leader pin |
| 12/26/1978 | US4131243 Tape cassette |
| 12/26/1978 | US4131199 Record disk cartridge |
| 12/26/1978 | US4131197 Container for a cassette containing a recording tape, particularly for a magnetic-tape cassette |
| 12/26/1978 | CA1045244A1 Magnetic recording and reproducing apparatus |
| 12/19/1978 | US4130848 Cassette tape recording and/or reproducing apparatus |
| 12/19/1978 | US4130845 Disc cabinet recirculating air flow system |
| 12/19/1978 | US4130620 Photoresist |
| 12/19/1978 | US4130221 Torsion spring door for a videocassette |
| 12/19/1978 | US4129937 Method of making grounded transducer for magnetic record disks |
| 12/19/1978 | CA1044681A1 Continuous loop tape cassette |
| 12/12/1978 | US4129891 Double partitioning of flexible disk pack and associated apparatus |
| 12/12/1978 | CA1044207A1 Container for magnetic tape |
| 12/05/1978 | US4128216 Shim for cassette tapes and method of shaping the same |
| 12/05/1978 | US4128198 Endless tape loop storage apparatus |
| 12/05/1978 | US4127925 Method of manufacturing and loading magnetic tape cassettes, particularly compact cassettes |
| 11/28/1978 | US4127242 Magnetic recording tape cartridge |
| 11/28/1978 | US4127239 Endless sound reproducing tape cartridge |
| 11/28/1978 | US4127225 Tape storage bin |
| 11/21/1978 | US4126283 Magnetic tape cassette |
| 11/21/1978 | CA1042933A1 Endless tape cartridge |
| 11/14/1978 | US4125760 Relief pattern impressing apparatus |
| 11/14/1978 | US4125668 Lubricants comprising dialkanolamine derivatives |
| 11/14/1978 | US4125189 Tape cassette case |
| 11/14/1978 | CA1042561A1 System for providing synchronization between audio recording tapes and with recording medium having visual or other information thereon |
| 11/14/1978 | CA1042394A1 Storage receptacle for magnetic tape cassette |
| 11/14/1978 | CA1042393A1 Storage receptacle for magnetic tape cassette |
| 11/07/1978 | US4124866 Video disc insertion/extraction system for a video disc player |
| 11/07/1978 | US4124672 Replication utilizing a casting process |
| 11/07/1978 | US4124118 Rotational restraint for a video disc package |
| 11/07/1978 | CA1041975A1 Cassette loading apparatus |
| 10/31/1978 | US4123789 Magnetic tape storage and transport cartridge and mechanisms therefor |
| 10/31/1978 | US4123788 Magnetic information carrier with optical servo tracks and apparatus for reading and writing the same |
| 10/31/1978 | US4122985 Tape cartridge with self-aligning tape transport roller |
| 10/31/1978 | US4122945 Tape reel container |
| 10/24/1978 | US4122505 Magneto-resistive reading head with suppression of thermal noise |
| 10/24/1978 | US4122502 Playback system for a magnetic tape recorder |
| 10/24/1978 | US4121891 Tape player cleaning device |
| 10/24/1978 | US4121877 Magnetic tape cassette storage case |
| 10/17/1978 | US4121264 Method for recording information signal and control signal |
| 10/17/1978 | US4120629 Production control apparatus |
| 10/10/1978 | US4120012 Diskette door |
| 10/10/1978 | US4119282 Magnetic tape magazine |
| 10/10/1978 | US4119200 Tape cassette holder |
| 10/10/1978 | US4119195 Protective case |
| 10/10/1978 | CA1039999A1 Method of creating a replicating matrix and the matrix created thereby |
| 10/03/1978 | US4118748 Member for limiting air door movement in a disk cartridge |
| 10/03/1978 | US4118616 Cassette, particularly a cassette for a reel of wide recording tape |
| 10/03/1978 | US4118287 Method for making a metal master for producing a gramophone record |
| 10/03/1978 | US4117931 Case for differently sized magnetic tape enclosures |
| 09/26/1978 | US4117523 Magnetic sensor having a hollow housing sealed with a shield cap |
| 09/26/1978 | US4117069 Polyesters, heating, contouring |
| 09/19/1978 | US4115826 Cartridge type magnetic tape recorders |
| 09/19/1978 | US4114833 Magnetic tape cassette |
| 09/19/1978 | US4114832 Cartridge for tape-, ribbon-, or filament-like information storage media |
| 09/19/1978 | US4114831 Concentric reel drive for a tape cassette |
| 09/19/1978 | US4114252 Manufacturing apparatus for tape cassette |
| 09/19/1978 | US4114226 Wear resistant alpha alumina article useful to clean magnetic tape and the process of producing said |
| 09/19/1978 | CA1038959A1 Video recording and/or reproducing apparatus, and record assembly for use therein |
| 09/12/1978 | US4113897 Smooth groove formation method employing spin coating of negative replica of inscribed disc |
| 09/12/1978 | US4113196 Magnetic tape cartridge loading apparatus |
| 09/12/1978 | US4113091 Holders for tape cassettes |
| 09/05/1978 | US4112471 Disk cartridge contamination shield |
| 09/05/1978 | US4112470 System for repeatedly reproducing a recorded material of a limited duration |
| 09/05/1978 | US4112030 Method and system for the production of sheet or platter shaped information carriers |