Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4857117 | Method of manufacturing a cold-rolled steel sheet having a good deep drawability | Kei Sakata, Koichi Hashiguchi | 1989-08-15 |
| 4804587 | Chromate-treated zinc-plated steel strip and method for making | Yuko Takeuchi, Yuki Nakahara, Hajime Kimura | 1989-02-14 |