Patent US 4887159A
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| Patent number | US 4887159A (click link for details and documents via Google Patents) |
|---|---|
| Title | Shadow visual effects wipe generator |
| Inventors | Daniel J. Chaplin |
| Company | The Grass Valley Group, Inc. |
| Filing date | 1989-03-14 |
| Grant date | 1989-12-12 |