Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889775 | Highly corrosion-resistant surface-treated steel plate | Masaaki Yamashita, Takahiro Kubota, Akira Enatsu, Norio Nikaido, Yoshiaki Miyosawa +1 more | 1989-12-26 |
| 4839241 | Composite zinc-silica electro-galvanized steel sheet excellent in corrosion resistance | Masaki Abe, Yukimitsu Shiohara, Hiroshi Naemura | 1989-06-13 |