Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6462868 | Display device for both hardcopy and digital images | David Irwin Lappen, William Ascher Lappen | 2002-10-08 |
| 5734693 | Radiation exposure system | Arthur S. Quint | 1998-03-31 |
| 4691267 | Film illuminator | — | 1987-09-01 |