Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4838161 | Arrangement for reversing pressure of cylinders and rollers in printing machines | Johannes Naumann | 1989-06-13 |
| 4809590 | Sealing arrangement for rotary vane-type motors | Johannes Naumann, Klaus Schrader, Bernhard Klose, Bob Dietrich | 1989-03-07 |