Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5076768 | Rotary piston compressor | Renate Ruf | 1991-12-31 |
| 4870990 | Double-flow butterfly valve part | Max Ruf, Wilhelm Hannibal | 1989-10-03 |
| 4319547 | Liquid-cooled internal combustion engine | — | 1982-03-16 |