Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10131973 | High strength spring steel and steel wire | Masayuki Hashimura, Hiroshi Hagiwara, Takanori Miyaki, Kouichi Yamazaki | 2018-11-20 |
| 8845825 | High strength spring-use heat treated steel | Masayuki Hashimura, Tatsuro Ochi, Hiroshi Hagiwara | 2014-09-30 |
| 8734600 | High strength steel wire for spring | Masayuki Hashimura, Hitoshi Demachi, Shoichi Suzuki, Motonobu Suehiro, Jun Kawaguchi +2 more | 2014-05-27 |