Quantel Limited
111Patents
2Active
111Granted
39Portfolio score
Filing activity: Sep 5, 1974 → Jan 24, 2013
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4602286A | Video processing for composite images | Electricity | 134 | Expired |
| US4774583A | Video signal processing systems | Electricity | 132 | Expired |
| US4524421A | Computerized graphics system and method using an electronically synthesized palette | Physics | 118 | Expired |
| US5276787A | Electronic graphic system | Physics | 116 | Expired |
| US5479210A | Video image processing system having variable data compression | Electricity | 116 | Expired |
| US5412402A | Electronic graphic systems | Physics | 103 | Expired |
| US5459529A | Video processing for composite images | Electricity | 78 | Expired |
| US4360831A | Multiple image digital processing system | Electricity | 68 | Expired |
| US4633416A | Video image creation system which simulates drafting tool | Emerging Cross-Sectional Technologies | 66 | Expired |
| US5361334A | Data processing and communication | Physics | 64 | Expired |
| US5808628A | Electronic video processing system | Physics | 63 | Expired |
| US5142616A | Electronic graphic system | Physics | 60 | Expired |
| US4514818A | Video image creation system which simulates drafting tool | Emerging Cross-Sectional Technologies | 58 | Expired |
| US5216755A | Video image creation system which proportionally mixes previously created image pixel data with currently created data | Physics | 56 | Expired |
| US4563703A | Video processing systems | Electricity | 50 | Expired |
| US4172264A | Control arrangement for video synchronizers | Electricity | 49 | Expired |
| US4688106A | Video processing system using multi-head disc store | Electricity | 49 | Expired |
| US5986665A | Electronic graphic system | Physics | 48 | Expired |
| US5418572A | Method of and apparatus for displaying images at different rates | Emerging Cross-Sectional Technologies | 38 | Expired |
| US4829455A | Graphics system for video and printed images | Physics | 35 | Expired |
| US5384667A | Video processing system | Physics | 35 | Expired |
| US5107252A | Video processing system | Physics | 35 | Expired |
| US3973817A | Interconnection of circuit boards | Electricity | 34 | Expired |
| US5077610A | Previewing cuts and transformations in an electronic image composition system | Physics | 34 | Expired |
| US4667221A | Video editing systems with allowable range for key signal set by detecting the range in a selected area | Electricity | 33 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.