Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6520718 | Sardine-bone construction method for large-section tunnel | Shigeki Nagatomo, Hideo Fujimoto, Shigehito Kaji, Hideki Takeuchi, Yoshio Mitarashi +4 more | 2003-02-18 |