Issued Patents 2005
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6973898 | Piston stopper for a free piston engine | Lixin Peng, Peter Hofbauer | 2005-12-13 |
| 6941904 | Air scavenging for an opposed piston opposed cylinder free piston engine | Ing. Peter Hofbauer, Lixin Peng, Kevin B. Fuqua | 2005-09-13 |
| 6904876 | Sodium cooled pistons for a free piston engine | Peter Hofbauer | 2005-06-14 |