Issued Patents 2011
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8065901 | Mandrel bar for high-alloy rolling, method for surface treating a mandrel bar, method for producing mandrel bar, and method for operating seamless pipe mill | Sumio Iida, Yasuyoshi Hidaka, Mitsuru Yoshizawa | 2011-11-29 |