Issued Patents 2004
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6749372 | Underground shell-pile continuous wall job practice and its special drill | — | 2004-06-15 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6749372 | Underground shell-pile continuous wall job practice and its special drill | — | 2004-06-15 |