Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6868678 | Non-intrusive refrigerant charge indicator | Fang-Chung Chen, Esher Kweller | 2005-03-22 |
| 6467284 | Frostless heat pump having thermal expansion valves | Fang-Chung Chen | 2002-10-22 |
| 6250090 | Apparatus and method for evaporator defrosting | Fang-Chung Chen, Ronald Edward Domitrovic | 2001-06-26 |
| 6233958 | Heat pump water heater and method of making the same | John Tomlinson, Fang-Chung Chen | 2001-05-22 |
| 5845502 | Heat pump having improved defrost system | Fang-Chung Chen, Richard Murphy | 1998-12-08 |
| 5622055 | Liquid over-feeding refrigeration system and method with integrated accumulator-expander-heat exchanger | Fang-Chung Chen | 1997-04-22 |
| 5245833 | Liquid over-feeding air conditioning system and method | Fang-Chung Chen | 1993-09-21 |
| 5245839 | Adsorption-type refrigerant recovery apparatus | Michael Chang, Chung-Yuan Yang, Yie-Zu Hu | 1993-09-21 |
| 4341088 | Highway vehicle exhaust gas refrigeration system | Zalman Lavan, Sushil K. Chaturvedi | 1982-07-27 |