Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7789974 | High-strength spring steel wire | Masayuki Hashimura, Hiroshi Hagiwara | 2010-09-07 |
| 7575646 | Heat-treated steel wire for high strength spring | Masayuki Hashimura, Hiroshi Hagiwara, Hiroaki Hayashi, Shouich Suzuki, Katsuaki Shiiki +2 more | 2009-08-18 |
| 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 |