Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5658134 | Compressor with suction valve in piston | Howard G. Westerman, Paul Howison Bergthold | 1997-08-19 |
| 4998513 | 4-stroke, stratified gas engine | — | 1991-03-12 |
| 4496286 | Control system for engine-driven compressor unit and method of operation thereof | — | 1985-01-29 |