Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4471515 | Rolls for single facer | Hiroyuki Takenaka, Keiichi Katayama, Tadashi Hirakawa | 1984-09-18 |
| 4398328 | Rolls for single facer | Hiroyuki Takenaka, Keiichi Katayama, Tadashi Hirakawa, Hiroaki Sasashige | 1983-08-16 |