Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8615993 | Bearing support system for free-piston stirling machines | David M. Berchowitz | 2013-12-31 |
| 7171811 | Multiple-cylinder, free-piston, alpha configured stirling engines and heat pumps with stepped pistons | David M. Berchowitz | 2007-02-06 |
| 7055321 | Suspension mechanism for stirling cycle engine | Katsuhiko Yoshida, Kanya Ito | 2006-06-06 |
| 5522222 | Cooling and heating system utilizing a vuilleumier pump | — | 1996-06-04 |
| 5465580 | Cooling and heating water circulation apparatus of Vuilleumier heat pump | — | 1995-11-14 |