Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4846778 | Slitter scorer including a head exchanging device | Tadashi Hirakawa, Yukuharu Seki | 1989-07-11 |
| 4843933 | Apparatus for determining positions of heads | Yukuharu Seki | 1989-07-04 |
| 4420999 | Rotary plate-shape material cutting arrangement | Tadashi Hirakawa, Toshiaki Kusubayashi | 1983-12-20 |
| 4314868 | Method and apparatus for preventing warp in corrugated cardboard | Tadeshi Hirakawa, Tochiaki Kusubayashi | 1982-02-09 |