Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4667953 | Sheet stacker | Tadashi Hirakawa, Masashi Waseda, Isao Tokumaru | 1987-05-26 |
| 4420999 | Rotary plate-shape material cutting arrangement | Tadashi Hirakawa, Yukio Oku | 1983-12-20 |
| 4238024 | Conveyor device | Tadashi Hirakawa, Kiyomitsu Yoshikawa | 1980-12-09 |