Patent US 4988982A
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| Patent number | US 4988982A (click link for details and documents via Google Patents) |
|---|---|
| Title | Touch pad machine control |
| Inventors | Bruce L. Rayner, Peter N. Johnson |
| Company | The Grass Valley Group, Inc. |
| Filing date | 1989-04-03 |
| Grant date | 1991-01-29 |