Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4971163 | Drilling bucket apparatus for cast-in-place piles with expanded bottoms | Akira Ohashi | 1990-11-20 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4971163 | Drilling bucket apparatus for cast-in-place piles with expanded bottoms | Akira Ohashi | 1990-11-20 |