Issued Patents 2002
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6467558 | Multiple air hammer apparatus and excavating direction correcting method therefor | Yoshio Akiyama, Taro Watanabe | 2002-10-22 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6467558 | Multiple air hammer apparatus and excavating direction correcting method therefor | Yoshio Akiyama, Taro Watanabe | 2002-10-22 |