Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7341403 | Method of constructing information correspondence pipe, constructed structure, and construction member | Fumiaki Tsuchiya, Isaburo Yagi, Yasuhiro Ueda, Osamu Ishizuka, Koji Aso +3 more | 2008-03-11 |
| 5197540 | Boring device for lining material in branched portions of lined conduit | Isaburo Yagi, Hideo Maruyama, Yoshifumi Osaka | 1993-03-30 |