Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9657615 | Silencer for internal combustion engine | Junichi Nakano, Shin-Ichiro Nishimura, Yoshitaka Hayama, Masashi Koyanagi, Takahiko Shimizu | 2017-05-23 |
| 9328647 | Exhaust pipe structure for internal combustion engine | Masashi Koyanagi, Kazuhiko Tanaka, Kenichi Misaki | 2016-05-03 |