Patent US 4851912A
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| Patent number | US 4851912A |
|---|---|
| Title | Apparatus for combining video signals |
| Inventors | Richard A. Jackson, Kevin D. Windrem |
| Company | The Grass Valley Group, Inc. |
| Filing date | 1988-07-18 |
| Grant date | 1989-07-25 |
| Cites |