Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4571002 | Hydraulic rock splitter | Shigetake Akanuma, Satoshi Takashima, Yoshitaka Ojiro | 1986-02-18 |
| 4566736 | Apparatus for mechanically breaking up rock | Shigetake Akanuma, Minoru Nakajima, Satoshi Takashima, Yoshitaka Ojiro, Hiroshi Kakuta +1 more | 1986-01-28 |
| 4286935 | Earth and sand conveyor system | Noboru Okuno, Takashi Takeuchi, Akihiko Tsuzuku, Masao Tanazawa, Minoru Nakajima | 1981-09-01 |