Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8007716 | Steel wire for high strength spring excellent in workability and high strength | Sumie Suda, Nobuhiko Ibaraki, Noritoshi Takamura, Naoki Terakado, Satoru Tendo +1 more | 2011-08-30 |
| 7074282 | Steel wire rod for hard drawn spring, drawn wire rod for hard drawn spring and hard drawn spring, and method for producing hard drawn spring | Nobuhiko Ibaraki, Atushi Inada, Sumie Suda, Noritoshi Takamura, Satoru Tendoh +1 more | 2006-07-11 |
| 4889567 | High strength and high toughness steel bar, rod and wire and the process of producing the same | Yukio Yamaoka, Kazuichi Hamada, Yoshiro Yamada, Yasunobu Kawaguchi, Yasuhiro Oki +2 more | 1989-12-26 |