Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10168047 | Water heating apparatus and system having a scale detecting function | Isao Satoh, Takao Muko, Yuki Maeshima | 2019-01-01 |
| 9732984 | Control apparatus for water heater | Shinichi Okamoto | 2017-08-15 |