Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4878788 | Drill for drilling a thin plate | Michitaka Katsuta, Masayasu Hino, Toshio Sasayama | 1989-11-07 |
| 4756650 | Twist drill | Michitaka Katsuta, Masayasu Hino, Kouhei Matsumoto, Yoshio Nakahara, Tosio Sasayama | 1988-07-12 |