Issued Patents 2019
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10465943 | Water heat exchanger with tube drainage member | Toshimitsu Nagasaka | 2019-11-05 |
| 10458728 | Turbulence member and heat exchanger using same, and water heater | Hidenao Negi, Toshimitsu Nagasaka | 2019-10-29 |
| 10197343 | Turbulence generator | Hidenao Negi, Toshimitsu Nagasaka | 2019-02-05 |