Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7063657 | Method of constructing underground gallery by using pneumatic transfer system and stratum disposal method | Kazuo Okutsu, Hisashi Takamura, Koji Hane, Nobuyuki Matsui, Yasuyuki Hayakawa | 2006-06-20 |