Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5547260 | Auxiliary cutter units of a shield machine | Kazunari Kawai | 1996-08-20 |
| 5135326 | Articulated shield tunneling machine | Hideo Kanbayashi, Yoshihisa Yamamoto | 1992-08-04 |
| 5110188 | Deformed shield tunneling method and tunneling machine | Kazunari Kawai | 1992-05-05 |
| 5107938 | Apparatus for detecting position of underground excavator | Akira Okamoto, Shoichi Sakanishi, Yoshihisa Yamamoto | 1992-04-28 |