Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889094 | Method for recognizing the power stroke of a cylinder of an internal combustion engine | Hans-Ernst Beyer, Robert Entenmann, Siegmar Forster, Rochus Knab, Walter Kunzel +9 more | 1989-12-26 |