Patent US 4873568A
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| Patent number | US 4873568A |
|---|---|
| Title | Digital video effects apparatus |
| Inventors | Richard A. Jackson, John Abt, Ronnie D. Barnett |
| Company | The Grass Valley Group, Inc. |
| Filing date | 1988-09-19 |
| Grant date | 1989-10-10 |
| Cites |