Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10371375 | Exhaust structure for combustion apparatus | Hideki Yamaguchi | 2019-08-06 |
| 10151509 | Water heater | — | 2018-12-11 |
| D822184 | Water heater | Hideki Yamaguchi, Hironao Matsunaga, Teizo Nanbu | 2018-07-03 |
| D804623 | Water heater | Hideki Yamaguchi, Hironao Matsunaga, Teizo Nanbu | 2017-12-05 |
| 7934538 | Heat exchanger and water heater | Toshihiko Obayashi, Satoshi Kawaguchi, Kohei Yamada | 2011-05-03 |