Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7763123 | Spring produced by a process comprising coiling a hard drawn steel wire excellent in fatigue strength and resistance to setting | Sumie Suda, Nobuhiko Ibaraki, Nao Yoshihara, Koji Harada | 2010-07-27 |
| 7597768 | Steel wire for hard drawn spring excellent in fatigue strength and resistance to settling, and hard drawn spring and method of making thereof | Sumie Suda, Nobuhiko Ibaraki, Nao Yoshihara, Koji Harada | 2009-10-06 |