Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4571002 | Hydraulic rock splitter | Satoshi Takashima, Haruo Imamura, Yoshitaka Ojiro | 1986-02-18 |
| 4566736 | Apparatus for mechanically breaking up rock | Minoru Nakajima, Satoshi Takashima, Haruo Imamura, Yoshitaka Ojiro, Hiroshi Kakuta +1 more | 1986-01-28 |
| 4474410 | Power-driven, wedge-operated rock splitter | Koji Ogaki, Yoshinori Takada, Yoshitaka Ojiro, Shigeru Harada | 1984-10-02 |
| 4363518 | Method and apparatus for fracturing rock beds | Joji Nakamura | 1982-12-14 |