Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4721339 | Rock crushing device and a method thereof | Kenji Hagimori, Toshinori Asahi | 1988-01-26 |
| 4711501 | Rock crushing device | Akiya Maeda, Yukinobu Masaka, Masahiro Nomura, Yasuo Yamada, Tetsuro Tatsuhama | 1987-12-08 |