Patent US 4920415A
| Patent number | US 4920415A (click link for details and documents via Google Patents) |
|---|---|
| Title | Self keyer |
| Inventors | Daniel J. Chaplin |
| Company | The Grass Valley Group, Inc. |
| Filing date | 1989-03-20 |
| Grant date | 1990-04-24 |
| Patent number | US 4920415A (click link for details and documents via Google Patents) |
|---|---|
| Title | Self keyer |
| Inventors | Daniel J. Chaplin |
| Company | The Grass Valley Group, Inc. |
| Filing date | 1989-03-20 |
| Grant date | 1990-04-24 |