Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5487627 | Counter sink drill | Takao Koyama, Kouji Hashimoto, Yutaka Adachi | 1996-01-30 |
| 5217332 | Drill bit for advanced materials | Kazuo Takasaki, Yasunori Murakami, Koji Hashimoto, Yutaka Adachi | 1993-06-08 |
| 4395169 | Drill bit | Takashi Kashiwagi | 1983-07-26 |