Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6605343 | Composite material and synthetic sleeper using the composite material | Koji Motoi, Ryuichi Matsuo, Takeshi Muranaka | 2003-08-12 |
| 6338622 | Pipe extrusion die | Yoshihiro Yoshimura, Katunari Nishimura, Masahiro Yamada | 2002-01-15 |