Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4831862 | Multistep bending machine | Tadahiko Nagasawa, Katsumi Koyama | 1989-05-23 |
| 4801090 | Discharge pipe and discharge apparatus using the same | Yoshiyuki Yoshida, Kazutaka Onozuka, Toshihide Tsuji, Kensuke Miyazaki, Yoshio Koyama | 1989-01-31 |