Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8020897 | Joint structure of steel pipe and light metal pipe | Toshiyuki Katayama, Yoshio Nakano, Takashi Yagi | 2011-09-20 |
| 7661720 | Connection structure for different kinds of metal tubes | Yoshio Nakano, Toshiyuki Katayama, Takashi Yagi | 2010-02-16 |