Issued Patents 2017
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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 |