Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4619525 | Camera casing for microfilm cameras | Peter Ruppel | 1986-10-28 |
| 4556302 | Camera box for microfilm cameras | Peter Ruppel, Karl Hultner | 1985-12-03 |
| 4551012 | Microfilm camera for filming punch cards | Peter Ruppel | 1985-11-05 |