Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4571002 | Hydraulic rock splitter | Shigetake Akanuma, Haruo Imamura, Yoshitaka Ojiro | 1986-02-18 |
| 4566736 | Apparatus for mechanically breaking up rock | Shigetake Akanuma, Minoru Nakajima, Haruo Imamura, Yoshitaka Ojiro, Hiroshi Kakuta +1 more | 1986-01-28 |