Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6640047 | Hybrid water heater with electrical heating unit and combustor | Hidemine Murahashi | 2003-10-28 |
| 6627858 | Hot-water supply system | Hisayoshi Sakakibara, Eiji Takahashi, Tomohisa Yoshimi, Tomoaki Kobayakawa, Kazutoshi Kusakari +1 more | 2003-09-30 |