Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7818973 | Air-conditioning system and method of installing energy recovery apparatus | Yuji Tanaka, Yukihiro Fujita, Eiji Koyama | 2010-10-26 |
| 7296429 | Air-conditioning system and method of installing energy recovery apparatus | Yuji Tanaka, Yukihiro Fujita, Eiji Koyama | 2007-11-20 |