Issued Patents 2021
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11168922 | Heat exchanger tube, heat exchange unit, heat exchange apparatus, hot water supply system, and method of manufacturing heat exchanger tube | Toshiaki Aoki | 2021-11-09 |
| 11103818 | Filter device and water heater | Toshiaki Aoki, Kyohei Matsushita | 2021-08-31 |
| 11035571 | Piping connection unit, air supply or exhaust tube, and combustion apparatus | Toshiaki Aoki | 2021-06-15 |