Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8821154 | Combustion apparatus and method for combustion control thereof | Akihito Yamashita, Yuichi Mochizuki, Katsumi Naitoh | 2014-09-02 |
| 8695539 | Water heater and control method therefor | Akito Watanabe, Jun Aiso | 2014-04-15 |
| 6606968 | Water heater unit | Akihito Yamashita | 2003-08-19 |