Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8770153 | Water heater | Tetsurou Hamada, Yoshinori Kanda | 2014-07-08 |
| 7523721 | Heat exchanger and water heater | Tetsurou Hamada, Hitoshi Hara, Kozo Uehara, Hiroaki Takashima | 2009-04-28 |
| 7428883 | Heat exchanger and water heater | Tetsurou Hamada, Hitoshi Hara, Kozo Uehara, Hiroaki Takashima, Mitufuku Asakawa | 2008-09-30 |