Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4885215 | Zn-coated stainless steel welded pipe | Keiichi Yoshioka, Kenji Watanabe | 1989-12-05 |
| 4801658 | Curable resin and process for preparing the same | Hisao Furukawa, Naotami Ando | 1989-01-31 |