Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4803343 | Electric fluid heating apparatus utilizing a vaporizable working fluid | Junji Sotani, Tatsuya Koizumi, Nobuyoshi Mashino, Susumu Seo | 1989-02-07 |
| 4745965 | Separate type heat exchanger | Akiji Katsura, Tatsuya Koizumi, Junji Sotani, Yuichi Kimura | 1988-05-24 |