Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8365686 | Malfunction detection device for hot water supplier | Shigehiko Matsuoka, Katsuya Kuwaki | 2013-02-05 |
| 7228695 | Heat pump type hot water supply device | Shinichi Sakamoto | 2007-06-12 |