Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4691788 | Lateral hole boring method and apparatus | Shoji Yoshida, Yasuhiko Haru, Toshimichi Ikeda, Mikio Aoyama, Takeo Iida | 1987-09-08 |
| 4647073 | Clamping device for underground pipes | — | 1987-03-03 |