Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7678204 | Good-workability and high-strength cold-rolled steel sheet excellent in post-painting corrosion resistance | Toshiyuki Katsumi, Kazuhiko Honda, Koki Tanaka, Kaoru Yamazaki, Katsuyoshi Kaneko +2 more | 2010-03-16 |
| 6346157 | Manufacturing method of suspension spring for car | Yoshiyuki Takezawa, Kazuo Ichiki, Naoki Tadakuma, Hiroshi Akiyama | 2002-02-12 |