Independent Broadcasting Authority
43Patents
0Active
43Granted
37Portfolio score
Filing activity: Jun 4, 1973 → Jan 7, 1988
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4736422A | Encrypted broadcast television system | Electricity | 271 | Expired |
| US4052719A | Television receiver system having facility for storage and display of character information selected from digitally encoded broadcast transmissions | Electricity | 225 | Expired |
| US3996583A | System for processing data signals for insertion in television signals | Electricity | 193 | Expired |
| US4611227A | Decoder for digital information T.V. signal | Electricity | 121 | Expired |
| US3961137A | Biphase digital television systems | Electricity | 118 | Expired |
| US4802215A | Security system for television signal encryption | Electricity | 113 | Expired |
| US4636851A | Signal coding for secure transmission | Electricity | 106 | Expired |
| US4636854A | Transmission system | Electricity | 102 | Expired |
| US4277807A | Recording digital signals | Electricity | 32 | Expired |
| US4563710A | Digital television tape recording | Electricity | 26 | Expired |
| US4730217A | Movement detector for use in television signal processing | Electricity | 22 | Expired |
| US4658296A | Dynamic noise reduction for video | Electricity | 21 | Expired |
| US4703358A | Apparatus for processing a television signal including a movement detector | Physics | 16 | Expired |
| US4858005A | System for encoding broadcast quality television signals to enable transmission as an embedded code | Electricity | 15 | Expired |
| US4216460A | Transmission and/or recording of digital signals | Physics | 15 | Expired |
| US4675722A | Apparatus for deriving synchronization signals for component television video signal reception | Electricity | 14 | Expired |
| US4280147A | Digital television system and method | Physics | 14 | Expired |
| US4392019A | Surround sound system | Electricity | 13 | Expired |
| US4700345A | Downsampling and prefilter implementation in television systems | Electricity | 12 | Expired |
| US4352129A | Digital recording apparatus | Electricity | 11 | Expired |
| US4748496A | Transmission and reception of television signals to produce extended definition pictures | Electricity | 11 | Expired |
| US4216496A | Apparatus for detecting and measuring interference in transmission signals | Electricity | 11 | Expired |
| US4276564A | Television systems | Electricity | 10 | Expired |
| US4215367A | Television systems | Electricity | 9 | Expired |
| US4166271A | Digital recognition circuits | Electricity | 8 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.