Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7735325 | Power generation methods and systems | Frank Ruggieri, Rudolph N. J. Draaisma, Napoleon P. Salvail, Clyde Zielke | 2010-06-15 |
| 6158396 | Water boiler with metal core | John Horrocks | 2000-12-12 |
| 6138457 | Combustion powered cooling system | Thomas B. de Treville | 2000-10-31 |
| 5782208 | Water boiler with metal core | John Horrocks | 1998-07-21 |
| 5671700 | High efficiency water boiler having finned heat exchanger | — | 1997-09-30 |
| 5509274 | High efficiency heat pump system | — | 1996-04-23 |
| 5313874 | High efficiency pool heating system and power unit | — | 1994-05-24 |
| 5246350 | High efficiency solar powered pumping system | Kidambi Raghunathan | 1993-09-21 |
| 5205133 | High efficiency pool heating system | — | 1993-04-27 |