Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6572716 | Fine ferrite-based structure steel production method | Tohru Hayashi, Shiro Torizuka, Kaneaki Tsuzaki, Kotobu Nagai | 2003-06-03 |
| 6464807 | Production method of ultra fine grain steel | Shiro Torizuka, Kaneaki Tsuzaki, Kotobu Nagai | 2002-10-15 |
| 6221178 | Ultra-fine grain steel and method for producing it | Shiro Torizuka, Kaneaki Tsuzaki, Kotobu Nagai | 2001-04-24 |