Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9285148 | Air conditioner using oil return operation based on outdoor air temperature | Seiji Hiramatsu, Tetsuo Tsuji | 2016-03-15 |
| 6883342 | Multiform gas heat pump type air conditioning system | Tadahiro Kato | 2005-04-26 |
| 6735969 | Gas heat pump type air conditioning device, engine-coolant-water heating device, and operating method for gas heat pump type air conditioning device | Hiraku Kunita, Ryuji Morishima, Kazuo Yamagishi | 2004-05-18 |