Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4990027 | Shield tunneling method and shield machine therefor | Masato Hattori, Akira Kamide | 1991-02-05 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4990027 | Shield tunneling method and shield machine therefor | Masato Hattori, Akira Kamide | 1991-02-05 |