Keith Lucas
22Patents
17h-index
10Co-inventors
78Inventor score
Filing activity: Jun 24, 1983 → Dec 7, 2012
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5400401A | System and method for transmitting a plurality of digital services | Electricity | 472 | Expired |
| US4890321A | Communications format for a subscription television system permitting transmission of individual text messages to subscribers | Electricity | 429 | Expired |
| US4829569A | Communication of individual messages to subscribers in a subscription television system | Electricity | 418 | Expired |
| US4885775A | Information display scheme for subscribers of a subscription television system | Electricity | 298 | Expired |
| US4866770A | Method and apparatus for communication of video, audio, teletext, and data to groups of decoders in a communication system | Electricity | 162 | Expired |
| US4642688A | Method and apparatus for creating encrypted and decrypted television signals | Electricity | 145 | Expired |
| US4890319A | Method for controlling copying of protected information transmitted over a communications link | Electricity | 109 | Expired |
| US5237413A | Motion filter for digital television system | Electricity | 66 | Expired |
| US4719642A | Error detection and concealment using predicted signal values | Physics | 54 | Expired |
| US5231485A | Method and apparatus for transforming between fixed-rate vector quantized data and variable rate vector quantized data | Electricity | 52 | Expired |
| US5553141A | Encryption and decryption (scrambling and unscrambling) of video signals | Electricity | 33 | Expired |
| US6546113B1 | Method and apparatus for video watermarking | Physics | 28 | Expired |
| US4652903A | Frequency generation for multiplexed analog component color television encoding and decoding | Electricity | 27 | Expired |
| US5361098A | Methods and apparatus for generating a picture-in-picture digital television frame by inserting a mean-only frame into a full-size frame | Electricity | 23 | Expired |
| US5204899A | Vector quantization method employing mirrored input vectors to search codebook | Electricity | 20 | Expired |
| US4989091A | Scan converter for a high definition television system | Electricity | 19 | Expired |
| US5247348A | Method for selecting reproduction quality of transmitted vector quantized data | Electricity | 17 | Expired |
| US4866519A | Method and apparatus for increasing the vertical definition of a transmitted television signal | Electricity | 15 | Expired |
| US5235418A | Method and apparatus for low frequency removal in vector quantization | Electricity | 14 | Expired |
| US5053859A | High definition B-MAC television signal transmission system | Electricity | 4 | Expired |
| US4965661A | Method and apparatus for increasing the definiton of an NTSC video signal using an augmentation channel | Electricity | 3 | Expired |
| US9199170B2 | Pass-structured game platform | Human Necessities | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.