Datatape Incorporated
43Patents
0Active
43Granted
33Portfolio score
Filing activity: Apr 19, 1982 → Dec 30, 1992
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4989110A | Full radius carrier to drum contact in a rotary head scanner | Physics | 63 | Expired |
| US4984108A | Apparatus for transporting magnetic tape cassettes of different sizes | Physics | 30 | Expired |
| US4772963A | Duplicate digital date recording apparatus for enhancing bit error rate performance of a data storage medium | Physics | 23 | Expired |
| US4933959A | Tracking bit synchronizer | Physics | 21 | Expired |
| US4891720A | Belt drive system for a magnetic tape cassette transport/accessor | Physics | 21 | Expired |
| US5341134A | Simple coding scheme for DC free channel codes of form M/N, where M=N-1 and M and N are positive integers | Physics | 14 | Expired |
| US4991041A | Apparatus for moving a cassette between storage and receiving locations | Physics | 13 | Expired |
| US5163070A | Digital data synchronizer | Electricity | 12 | Expired |
| US4763210A | Helical scan tape guide apparatus | Physics | 11 | Expired |
| US5003417A | Spring dampener assembly for a sprocket driven belt drive system | Physics | 11 | Expired |
| US4826097A | Reel spindle apparatus with internal clamping member | Physics | 10 | Expired |
| US4654837A | Magneto-optic transducer with enhanced signal performance | Physics | 8 | Expired |
| US4964557A | Bidirectional web guiding system | Physics | 8 | Expired |
| US4772969A | """Expandable loop"" method of and apparatus for automatically threading a web material" | Physics | 8 | Expired |
| US5164868A | Magnetic tape threading and compliance element guiding apparatus | Physics | 7 | Expired |
| US5325246A | Automatic tracking method for helical scan magnetic tape recorder using reproduced timing signal to sample two out-of-phase reference signals | Physics | 7 | Expired |
| US4609961A | Faraday-effect magneto-optic transducer | Physics | 7 | Expired |
| US4819096A | Rotary head scanner including anamorphic beam-shaping apparatus in an optical signal-transmission channel | Physics | 7 | Expired |
| US4779150A | Pneumatically controlled tape-loading tape-transporting apparatus | Physics | 7 | Expired |
| US5003424A | Apparatus for changing the helix angle of magnetic tape relative to a rotary head scanner | Physics | 6 | Expired |
| US4967290A | Multiple channel rotary magnetic head scanner having stackable electro-optical signal transmission modules | Physics | 5 | Expired |
| US5321566A | Magnetic tape threading and transport apparatus including a sensor for controlling air bearing block movement | Physics | 5 | Expired |
| US4991038A | Automatic threading of a web using a flexible threading band | Physics | 5 | Expired |
| US4647999A | Frame for positioning transducing head | Physics | 5 | Expired |
| US4947069A | Low power magnetic tape reel motor and brake assembly | Electricity | 5 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.