Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7310960 | Transcritical heat pump water heater with drainage | Tobias H. Sienel, Lili Zhang | 2007-12-25 |
| 7028494 | Defrosting methodology for heat pump water heating system | Jean-Philippe Goux, Yu H. Chen, Julio Concha, Tobias H. Sienel, Sylvain Douzet | 2006-04-18 |
| 7010925 | Method of controlling a carbon dioxide heat pump water heating system | Tobias H. Sienel, Yu H. Chen, Bryan A. Eisenhower, Julio Concha, Young Kyu Park +2 more | 2006-03-14 |