Issued Patents 1989
Showing 1–2 of 2 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 |