| Patents for G11B 17 - Guiding record carriers not specifically of filamentary or web form, or of supports therefor (20,090) |
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| 12/23/1981 | EP0042061A1 Magnetic recording disk drives |
| 12/22/1981 | CA1114948A1 Video disc package |
| 12/22/1981 | CA1114947A1 Record support and alignment apparatus for a video disc player |
| 12/16/1981 | EP0041705A1 Device for inserting disc-like recording media into a disc drive |
| 12/15/1981 | US4306260 Dual magnetic head mount |
| 12/15/1981 | US4306259 Flexible-disc drive spindle assembly with brushless DC motor |
| 12/15/1981 | CA1114500A1 Flexible disk cartridge |
| 12/15/1981 | CA1114499A1 Controlled surface finish for flexible disk stabilizing plate |
| 12/09/1981 | EP0041137A1 Drive mechanism for disc-type record carriers |
| 12/08/1981 | US4305146 Disc player having disc stabilizing apparatus |
| 12/08/1981 | US4305145 Spindle retracting mechanism for disc record player |
| 12/08/1981 | US4305131 Dialog between TV movies and human viewers |
| 12/08/1981 | CA1114061A1 Disk interlock mechanism |
| 12/02/1981 | EP0040880A1 Apparatus for reproducing information stored in discs |
| 11/25/1981 | EP0040523A2 Case for a disc-shaped recording medium |
| 11/25/1981 | EP0040278A1 A method of sealing a rotary shaft, a magnetic seal apparatus and a container for ferrofluid for use therein |
| 11/24/1981 | US4302832 Radial-tracking programmable record player with record handling door mechanism |
| 11/18/1981 | EP0039975A2 Device for loading and ejecting a diskette into or from a disk drive |
| 11/17/1981 | US4301486 System for recording information on a flexible information storage media |
| 11/17/1981 | CA1112761A1 Air bearing for information carrier in the form of a flexible disc and disc reader using this air bearing |
| 11/03/1981 | US4298976 Microphonograph record |
| 11/03/1981 | CA1111963A1 High performance floppy pack and associated systems |
| 11/03/1981 | CA1111962A1 Cassette and card recording and/or reproducing apparatus |
| 10/20/1981 | US4296491 Information carrier having inter-track identification code information |
| 10/20/1981 | CA1110944A1 Locking mechanism for record package |
| 10/14/1981 | EP0037596A1 Drive mechanism for flexible record carriers |
| 10/14/1981 | EP0037487A1 Method and apparatus for retrieving a storage position on a record carrier |
| 10/06/1981 | CA1110099A1 Daylight unloader for x-ray cassettes |
| 10/01/1981 | WO1981002805A1 Record player |
| 09/29/1981 | US4292657 Partitionable flexible disk pack |
| 09/29/1981 | US4291886 Automatic record changer |
| 09/22/1981 | US4291349 Diverter means for flexible disk pack and associated method |
| 09/22/1981 | CA1109557A1 Disk file with symmetrical hollow base |
| 09/22/1981 | CA1109400A1 Disc clamping device |
| 09/21/1981 | EP0029458A4 Isolated multiple core magnetic transducer assembly. |
| 09/15/1981 | CA1109149A1 Video disc handling system for a video disc player |
| 09/15/1981 | CA1109148A1 Optical reader for information discs equipped with means for automatic access to the information |
| 09/15/1981 | CA1109147A1 Cartridge loading mechanism |
| 09/08/1981 | CA1108755A1 Magnetic recording and reproducing device |
| 09/01/1981 | US4286790 Optical disc changer apparatus |
| 09/01/1981 | US4286789 Simplified record player |
| 08/26/1981 | EP0034245A2 Transducer carriage assembly |
| 08/25/1981 | US4286297 Suspension for flying magnetic head |
| 08/25/1981 | CA1107859A1 Record handling system for a video disc player |
| 08/18/1981 | US4285018 Disk file |
| 08/11/1981 | CA1106968A1 Magnetic disk cartridge |
| 08/04/1981 | US4282599 Phonographic record spindle adaptor |
| 08/04/1981 | CA1106495A1 Flexible disk storage apparatus |
| 07/29/1981 | EP0032771A1 Information recording and/or reading system |
| 07/14/1981 | US4279004 Method for controlling rotary memory device |
| 07/14/1981 | US4278258 Container for holding at least one recording disk and disk playing system |
| 07/09/1981 | WO1981001906A1 Information recording apparatus with a disc loaded in a cassette |
| 07/07/1981 | US4277810 Floppy disc structure with rectangular casing |
| 07/07/1981 | CA1104717A1 Video disc insertion/extraction system for a video disc player |
| 06/30/1981 | US4276636 Cushion disc for phonograph records |
| 06/24/1981 | EP0030754A1 Centering element and drive unit for interchangeable information discs in a system for writing or reading information |
| 06/24/1981 | EP0030623A1 Methods of fabricating magnetic records, magnetic records so fabricated, and magnetic recording and reproducing apparatus comprising such fabricated magnetic records |
| 06/17/1981 | EP0030317A2 Playback apparatus for a disc-shaped record carrier, especially a video or audio disc |
| 06/16/1981 | US4274119 Recording disk cover and player apparatus for removing cover |
| 06/16/1981 | US4273342 Protective cartridge for optical discs |
| 06/16/1981 | CA1103350A1 R/w arm that prevents catastrophic failure |
| 06/10/1981 | EP0029946A1 Arrangement for storing and relocating positions on record carriers in tape form in a recording and/or reproducing apparatus |
| 06/09/1981 | US4272795 Information storage system and recording cartridge having precise alignment features |
| 06/09/1981 | US4272794 Disc memory drive with improved cartridge handling |
| 06/09/1981 | US4272083 Video disc player having record extracting mechanism |
| 06/03/1981 | EP0029458A1 Isolated multiple core magnetic transducer assembly |
| 06/02/1981 | US4271489 Optical disc player system |
| 05/27/1981 | EP0029064A1 Gas circulation and filtration apparatus for magnetic disc recording systems |
| 05/26/1981 | US4270150 Video frame storage recording and reproducing apparatus |
| 05/26/1981 | CA1101990A1 Device for centering and driving flexible discs |
| 05/19/1981 | US4268878 Gas circulation and filtration apparatus for magnetic disc recording systems |
| 05/12/1981 | US4266784 Video disc caddy having disc entrapment |
| 05/12/1981 | CA1101119A1 Multiple pack magnetic disk system |
| 05/05/1981 | CA1100632A1 Self centering disk |
| 05/05/1981 | CA1100629A1 Grounded transducer for magnetic record disks |
| 05/05/1981 | CA1100413A1 Automatic record player |
| 04/21/1981 | US4263629 Disk file with symmetrical hollow base |
| 04/16/1981 | WO1981001071A1 Z-axis flexure suspension apparatus |
| 04/16/1981 | WO1981001070A1 Transducers and supporting arm assembly for double sided floppy disk |
| 04/15/1981 | EP0026880A1 Disc-shaped record carrier and process for its production |
| 04/15/1981 | EP0026837A1 Flexible magnetic disk drive machine |
| 04/14/1981 | US4262316 Record storage apparatus |
| 04/08/1981 | EP0026475A1 Process and apparatus for centering and axially positioning a disk-shaped recording medium |
| 04/07/1981 | US4260161 Arrangement for vibrationless coupling of a phonograph record with the turntable of a phonograph |
| 04/01/1981 | EP0026152A1 Front loading type record player |
| 04/01/1981 | EP0025826A1 Flying magnetic head/arm transducer assembly |
| 03/17/1981 | US4257078 Read device for plane magnetic recording medium |
| 03/17/1981 | CA1097805A1 Disk file access method using sample position signal |
| 03/17/1981 | CA1097801A1 Digital phase servo system |
| 03/11/1981 | EP0024858A2 Video record disc and playback apparatus and method for it |
| 02/24/1981 | US4253129 Disc pack handle mechanism |
| 02/24/1981 | US4253125 Head loading and unloading mechanism for magnetic flexible disk |
| 02/24/1981 | US4252328 Self-activating ferrofluid seal and method |
| 02/24/1981 | US4252327 Video disc player |
| 02/24/1981 | CA1096495A1 Clamping device for a rotatable information carrying record |
| 02/17/1981 | CA1096039A1 Fluidic transducer access opening in a stack of flexible record disks |
| 02/10/1981 | US4250529 Method and apparatus for opening disk packs |
| 02/10/1981 | CA1095617A1 Gripping device for magnetic diskettes |
| 02/03/1981 | CA1095167A1 Change-over mechanism for recording media, especially for floppy disks |
| 01/27/1981 | US4247119 Record side identification apparatus for video disc player |