Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6109305 | Double walled pipe, jacking method and pipe end structure of leading pipe | Tomoya Fujimoto, Shigeru Morishita, Masaru Murakami, Akira Adachi, Mitsutoshi Hayashi +4 more | 2000-08-29 |
| 6004073 | Double walled pipe, jacking method and pipe end structure of leading pipe | Tomoya Fujimoto, Shigeru Morishita, Masaru Murakami, Akira Adachi, Mitsutoshi Hayashi +4 more | 1999-12-21 |
| 5615976 | Double walled pipe, jacking method and pipe end structure of leading pipe | Tomoya Fujimoto, Shigeru Morishita, Masaru Murakami, Akira Adachi, Mitsutoshi Hayashi +4 more | 1997-04-01 |