Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10060015 | Steel for high-strength bolts which has excellent delayed fracture resistance and bolt formability, and bolt | Yosuke Matsumoto, Masamichi Chiba, Yoshimasa Ureshino, Reiko Kato | 2018-08-28 |
| 9845519 | Boron-added high strength steel for bolt and high strength bolt having excellent delayed fracture resistance | Yosuke Matsumoto, Masamichi Chiba | 2017-12-19 |
| 9695488 | Steel for bolt use, bolt, and method for manufacturing bolt | Yosuke Matsumoto, Masamichi Chiba | 2017-07-04 |
| 6322641 | High-carbon steel wire superior in resistance to longitudinal cracking, steel product for the same, and process for production of the same | Koichi Makii, Nobuhiko Ibaraki, Kenji Ochiai, Sakae Wada, Takaaki Minamida +1 more | 2001-11-27 |
| 6206984 | Non-heat treated wire or bar steel for springs | Nao Yoshihara, Nobuhiko Ibaraki | 2001-03-27 |