Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5943993 | Four-stroke internal combustion engine with spark ignition | Hartmut Carstensen, Christian Beidl | 1999-08-31 |
| 5727520 | Four-stroke internal combustion engine with spark ignition | Martin Wirth, Walter Piock | 1998-03-17 |
| 4465515 | Piston ring for internal combustion engine | — | 1984-08-14 |