Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5653203 | Reciprocating piston engine having a mass-balancing arrangement | Mathias von Essen, Werner Bick | 1997-08-05 |
| 5595146 | Combustion engine having a variable compression ratio | Hans-Joerg Hermanns, Torsten Schellhase, Frank Widmann | 1997-01-21 |