Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4266885 | Method of constructing a continuous cut-off wall and a core of a fill-type dam | Kazuaki Naito, Takaiki Tetekawa, Shigeyuki Sogo, Tetu Yasuoka, Hidetoshi Hosoi | 1981-05-12 |