Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5349765 | Excavator for constructing underground continuous wall and construction method using the excavator | Katsumi Kitanaka | 1994-09-27 |
| 5244315 | Excavator for constructing underground continuous wall and underground continuous wall construction method | Katsumi Kitanaka | 1993-09-14 |