Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5669439 | Laminated type heat exchanger | Etsuo Hasegawa, Toshiya Nagasawa, Keiichi Yoshii | 1997-09-23 |
| 5653283 | Laminated type heat exchanger | Keiichi Yoshii, Etsuo Hasegawa, Toshiya Nagasawa | 1997-08-05 |