Issued Patents All Time
Showing 51–53 of 53 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4698570 | Boom positioning apparatus for rock drill | — | 1987-10-06 |
| 4508035 | Explosive charging apparatus for rock drilling | Tohru Mashimo | 1985-04-02 |
| 4501199 | Automatically controlled rock drilling apparatus | Tohru Mashimo, Takashi Nishio | 1985-02-26 |