Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4553761 | Seal | Dieter Blesing, Hans-Joachim Walther | 1985-11-19 |
| 4396198 | Joint pin seal for a caterpillar track | Hermann Metzner, Karl Hoff, Herbert Schumacher | 1983-08-02 |
| 4371177 | Self-locking sealing and wiper ring | Gunter F. Bahr, Werner Hafner | 1983-02-01 |
| 4205595 | Piston | Werner Hafner | 1980-06-03 |