Patent US 4969041A
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| Patent number | US 4969041A |
|---|---|
| Title | Embedment of data in a video signal |
| Inventors | William J. O'Grady, Robert J. Dubner |
| Company | Dubner Computer Systems, Inc. |
| Filing date | 1988-09-23 |
| Grant date | 1990-11-06 |
| Cites |