Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4987445 | Scanning light contact duplicating apparatus | Dennis A. Burgess, William J. Campbell | 1991-01-22 |
| 4676633 | Progressive directional evacuation of vacuum copy frames | Dennis A. Burgess, William J. Campbell | 1987-06-30 |