Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5415711 | High-strength spring steels and method of producing the same | Masaaki Takagi, Shigeru Takeda | 1995-05-16 |
| 4634573 | Steel for cold forging and method of making | Toshio Yanagiya, Kenji Isokawa, Hisashi Ohta | 1987-01-06 |
| 4517015 | Steel refining method | Shuzi Sakakibara | 1985-05-14 |