Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8347826 | Heat exchanger, water heater and water tube | — | 2013-01-08 |
| 7458340 | Water heater | Nobuhiro Takeda, Hiroshi Asakura, Akira Tsutsumi, Kazuhiro Kimura, Shuji Kameyama +1 more | 2008-12-02 |