Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D822184 | Water heater | Hideki Yamaguchi, Hironao Matsunaga, Hidefumi Koda | 2018-07-03 |
| D804623 | Water heater | Hideki Yamaguchi, Hironao Matsunaga, Hidefumi Koda | 2017-12-05 |
| D570974 | Gas water heater | Tomofumi Kinugasa, Akira Tsutsumi, Satoshi Kawaguchi | 2008-06-10 |
| D570975 | Gas water heater | Tomofumi Kinugasa, Akira Tsutsumi, Satoshi Kawaguchi | 2008-06-10 |
| D570976 | Gas water heater | Tomofumi Kinugasa, Akira Tsutsumi, Satoshi Kawaguchi | 2008-06-10 |
| D570973 | Gas water heater | Tomofumi Kinugasa, Akira Tsutsumi, Satoshi Kawaguchi | 2008-06-10 |
| D483844 | Gas water heater | Nobuyuki Yamamoto, Hideki Yamaguchi, Takanori Nagano, Masanori Higashiuchi | 2003-12-16 |
| D483451 | Gas water heater | Nobuyuki Yamamoto, Hideki Yamaguchi, Takanori Nagano, Masanori Higashiuchi | 2003-12-09 |
| D483452 | Gas water heater | Nobuyuki Yamamoto, Hideki Yamaguchi, Takanori Nagano, Masanori Higashiuchi | 2003-12-09 |
| D483453 | Gas water heater | Nobuyuki Yamamoto, Hideki Yamaguchi, Takanori Nagano, Masanori Higashiuchi | 2003-12-09 |