Patents
Sitemap › G11 - Information storage › G11B - Information storage based on relative movement between record carrier and transducer › 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
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)
12/1981
12/24/1981WO1981003712A1 Flexible optical disc and method and apparatus for stabilizing during writing and/or reading of information thereon
12/24/1981WO1981003711A1 Cleaning device for tape recorder head
12/23/1981EP0042062A1 Magnetic disk cartridges
12/23/1981EP0042061A1 Magnetic recording disk drives
12/23/1981EP0042031A2 Single pass ribbon cartridge for impact printers and impact printer receiving such cartridge
12/22/1981US4307425 Breathing device for a closed housing of a magnetic memory device
12/22/1981US4307419 Video disc signal surface imaging apparatus
12/22/1981US4307045 Ultraviolet radiation, oxygen
12/22/1981US4306690 Magnetic tape carrier
12/22/1981US4306663 Cassette shell modification and method of assembly and use
12/22/1981US4306655 Holder or container for tape cartridges
12/22/1981CA1114948A1 Video disc package
12/15/1981US4306256 Preemphasis and clipping apparatus for reducing distortions
12/15/1981CA1114500A1 Flexible disk cartridge
12/15/1981CA1114352A1 Cassette
12/15/1981CA1114244A1 Magnetic recording medium
12/09/1981EP0041270A1 Magnetic recording disc cartridge
12/08/1981US4304806 Information carrying discs
12/08/1981US4304374 Tape cassette
12/08/1981US4304331 Shield for magnetic tape cassettes
12/08/1981CA1113896A1 Shipping and storage container
12/02/1981EP0040687A1 Magnetic tape cartridge with file protect feature
12/02/1981EP0040686A1 Magnetic tape cartridge with file protect feature
12/01/1981US4303952 Recording and reproducing system
12/01/1981US4303159 Video package
11/1981
11/25/1981EP0040523A2 Case for a disc-shaped recording medium
11/24/1981US4302787 Tape cassette and video recording and reproducing system using the same
11/24/1981US4302653 Method and apparatus for monitoring and controlling a resistance welding operation
11/24/1981US4301976 Tape cartridge
11/17/1981US4301488 Tape cassette
11/17/1981US4301486 System for recording information on a flexible information storage media
11/17/1981US4300729 Tape clamp for magnetic tape magazine
11/12/1981WO1981003113A1 Cassette storage racking system
11/10/1981US4300227 Replicable optical recording medium
11/10/1981US4300180 Amorphous spring-shield for tape cassette
11/10/1981CA1112229A2 Endless loop tape magazine
11/03/1981US4298897 Buffered recording
10/1981
10/29/1981WO1981003082A1 Tape system with optically contrasting data marks
10/27/1981US4297312 Method for preparing stylus lapping discs
10/27/1981US4296890 Process for the simplified packing of a magnetic tape for computer and winding core for carrying out this process
10/21/1981EP0038038A1 Receptacle with hinged cover
10/21/1981EP0038030A1 Air-flow system for a disk file
10/21/1981EP0037880A1 Method for connecting and starting up one disconnected cell into a series of electrolytic membrane cells
10/20/1981US4296448 Recording cartridge having a flat smoothing plane with a raised portion
10/20/1981US4295623 Variable position article holder
10/20/1981CA1111194A1 Method of duplicating plastics information carriers, as well as a moulding resin, substrate and die used in said method
10/20/1981CA1110944A1 Locking mechanism for record package
10/13/1981US4294640 Forming process for light gauge polymer sheet material
10/13/1981US4294418 Tape cartridge
10/07/1981EP0037073A2 Centering device to make a centre hole in discs
10/06/1981USRE30762 Method and apparatus for video signal recording
10/06/1981US4293885 Pad spring for a tape cassette
10/06/1981US4293882 Endless loop tape magazine, and a recording and/or playback machine utilizing the magazine
10/06/1981US4293881 System for priority transcribing of dictation
10/06/1981US4293102 Reel weight assembly
10/06/1981US4293075 Cabinet for holding magnetic tape cartridges and cassettes
10/06/1981CA1110207A1 Magazine-lid combination for jacketed magnetic disks
09/1981
09/30/1981EP0036806A1 Video cassette
09/29/1981USRE30756 Method and apparatus for video signal recording
09/29/1981US4292656 Enclosed-type magnetic disc recording and/or reproducing apparatus
09/29/1981US4292511 Apparatus and method for reading an identifying label on an information record
09/29/1981US4291801 Video cassette storage container
09/29/1981US4291800 Tape cassette
09/22/1981US4291353 System and method for cleaning a magnetic head transducer
09/22/1981US4291349 Diverter means for flexible disk pack and associated method
09/22/1981US4291343 Frequency-ratio apparatus
09/22/1981US4290821 Tape cartridge strap cleaning method
09/22/1981US4290567 Tape cassette brake assembly
09/22/1981US4290562 Hub for use in a magnetic recording tape cassette
09/22/1981US4290524 Video magazine and package therefor
09/16/1981EP0035933A1 Cartridge for an optical disk
09/15/1981US4290089 Magnetic-tape cassette with tape counting roller
09/15/1981US4289285 Magnetic tape cassette
09/15/1981US4289282 Tape reel
09/15/1981US4289235 Magnetic cassette storage case
09/15/1981CA1109089A1 Ribbon storage device
09/15/1981CA1109045A1 Endless ribbon cartridge
09/08/1981US4288827 Automatic switching device for cassette tape recorder with low frequency compensating means
09/08/1981US4288826 Pad device for use in tape cassette
09/08/1981US4288281 Appliance for adhering a sensing marker on a medium for recording information
09/08/1981US4288048 Cassette
09/08/1981US4287989 Storage container for magnetic tape cassettes
09/08/1981CA1108540A1 Method of and system for priority transcribing of dictation
09/02/1981EP0034756A1 Recipient for tape material
09/01/1981US4287587 Signal loss dectector for video disc
09/01/1981US4287388 Drive-in theatre sound distribution system
09/01/1981US4286790 Optical disc changer apparatus
08/1981
08/25/1981US4286300 Tape cassette
08/25/1981US4286294 Recording/reproducing system
08/25/1981US4285757 Tape end joining apparatus
08/25/1981US4285558 Cassette holder
08/25/1981US4285557 Storage tray for packaged articles
08/25/1981US4285554 Sunvisor cassette holder
08/25/1981US4285429 Tape cassette security container
08/25/1981CA1107859A1 Record handling system for a video disc player
08/20/1981WO1981002356A1 Magnetic tape cassette comprising a marking device for the unwinding of the tape
08/18/1981US4285056 Replicable optical recording medium
08/18/1981US4285020 Tape cassette
08/18/1981US4285018 Disk file
08/11/1981US4283026 Magnetic tape cassette
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