Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4261172 | Six-cylinder double-acting hot gas engine | Jan C. Bratt | 1981-04-14 |
| 4195613 | Double-acting four-cylinder hot gas engine | Jan C. Bratt | 1980-04-01 |
| 4191019 | Double-acting hot gas engine assemblage | Jan C. Bratt, Nils K. G. Rosenqvist | 1980-03-04 |