Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4883413 | Rotary spiral piston displacement machine having a silicon rubber biased seal | Fritz Spinnler, Jurg Weber | 1989-11-28 |
| 4796595 | Free-running pressure wave supercharger driven by gas forces | Ibrahim El-Nashar, Francois Jaussi, Hubert Kirchhofer, Christian Komauer, Andreas Mayer +1 more | 1989-01-10 |