Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8846152 | Antioxidant agent and process for producing metallic material | Kazuhiro Shimoda, Tomio Yamakawa, Koji Muramatsu, Yuji Inoue, Yasuyoshi Hidaka +3 more | 2014-09-30 |
| 8327676 | Upper-end formed glass complex for hot expanding piercing and method of manufacturing billet for hot extrusion pipe making | Tomio Yamakawa, Keishi Matsumoto, Hiroaki Murakami | 2012-12-11 |