Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8037930 | Heat exchanger | Haruhiko Watanabe, Kyoujirou Nakata | 2011-10-18 |
| 7681629 | Exhaust gas heat exchanger | Hiroo Yamaguchi, Kenshiro Muramatsu | 2010-03-23 |
| 7413002 | Corrugated fin and heat exchanger using the same | Toshihide Ninagawa, Yoshihiko Sonoda | 2008-08-19 |
| 6594896 | Method for making corrugated fins | Shinichi Morihira, Kiyokazu Futami, Keiichi Yoshii | 2003-07-22 |