Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5223049 | Steel for induction hardening | Tatsumi Urita | 1993-06-29 |
| 4946645 | Steel for gears, having high strength, toughness and machinability | Atsuyoshi Kumura, Sukehisa Niwa, Toshihiko Matsubara | 1990-08-07 |
| 4838961 | Method of manufacturing high strength blank a bolt | Kazunori Fukizawa, Mitsushi Higuchi | 1989-06-13 |
| 4778652 | High strength bolt | Kazunori Fukizawa, Mitsushi Higuchi | 1988-10-18 |
| 4584032 | Bolting bar material and a method of producing the same | Kenji Isokawa, Kenji Takahashi | 1986-04-22 |