Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6302621 | Segment for intake tunnels | Yoshihiro Tanaka | 2001-10-16 |
| 6095719 | Process for constructing intake pipe | Yoshihiro Tanaka | 2000-08-01 |
| 6092963 | Tail structure of shield driving machine | Yoshihiro Tanaka | 2000-07-25 |
| 6082930 | Shield driving machine | Yoshihiro Tanaka | 2000-07-04 |