Issued Patents 2002
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6419761 | Steels for cold forging and process for producing the same | Hideo Kanisawa, Makoto Okonogi | 2002-07-16 |
| 6406565 | High toughness spring steel | Hiroshi Hagiwara, Takanari Miyaki, Toshio Banno | 2002-06-18 |
| 6338763 | Steel wire for high-strength springs and method of producing the same | Hiroshi Hagiwara, Takanari Miyaki, Hiroaki Hayashi, Shoichi Suzuki, Ikuo Ochiai | 2002-01-15 |