Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4371242 | Objective lens exchanging arrangement in a microfilm reader | Karl-Heinz Dietrich, Josef Gruber, Walter Rauffer | 1983-02-01 |
| 4244641 | Microfilm reader | Wilfried Hofmann, Guenther Lueder, Peter Puechler, John Krueger, Walter Rauffer +1 more | 1981-01-13 |