Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6170567 | Heat exchanger | Keiichi Nakada, Kaoru Hasegawa | 2001-01-09 |
| 4766885 | Solar water heater | — | 1988-08-30 |
| 4724826 | Solar water heater incorporating heat pipe | — | 1988-02-16 |