Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6406565 | High toughness spring steel | Masayuki Hashimura, Hiroshi Hagiwara, Toshio Banno | 2002-06-18 |
| 6338763 | Steel wire for high-strength springs and method of producing the same | Masayuki Hashimura, Hiroshi Hagiwara, Hiroaki Hayashi, Shoichi Suzuki, Ikuo Ochiai | 2002-01-15 |