Issued Patents 2004
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6823897 | Four-way switching valve | Toshiyuki Shiota, Katsumi Koyama | 2004-11-30 |
| 6810911 | Four-way switching valve | Katsumi Koyama | 2004-11-02 |
| 6804970 | Method of controlling refrigeration cycle | Shinji Saeki | 2004-10-19 |
| 6783110 | Proportional solenoid valve | Tokumi Tsugawa, Katsumi Koyama, Toshiyuki Shiota, Yuusuke Inoue | 2004-08-31 |
| 6712281 | Expansion valve | Takeshi Kaneko | 2004-03-30 |
| 6694760 | Refrigerating cycle | Tokumi Tsugawa | 2004-02-24 |