Patent US 4689681A
Jump to navigation
Jump to search
| Patent number | US 4689681A (click link for details and documents via Google Patents) |
|---|---|
| Title | Television special effects system |
| Inventors | Richard A. Jackson |
| Company | The Grass Valley Group, Inc. |
| Filing date | 1986-10-24 |
| Grant date | 1987-08-25 |