Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4747340 | Piston for internal combustion engines | Klaus Schellmann, Siegfried Mielke | 1988-05-31 |
| 4683808 | Light alloy piston for internal combustion engines | Erich Wacker, Wilfried Sander, Klaus Schellmann | 1987-08-04 |
| 4274372 | Lightweight piston for internal combustion engines | Walter H. Kelm | 1981-06-23 |