Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4998776 | Shield tunneling with optional section and machine | Shohei Chida, Masami Kozaki, Toshinori Asahi, Seiji Iwasa, Taizou Fukunaga +1 more | 1991-03-12 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4998776 | Shield tunneling with optional section and machine | Shohei Chida, Masami Kozaki, Toshinori Asahi, Seiji Iwasa, Taizou Fukunaga +1 more | 1991-03-12 |