Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6998173 | Cemented carbide tool and method of making | Yixiong Liu, George P. Grab, Mark S. Greenfield | 2006-02-14 |
| 6638474 | method of making cemented carbide tool | Yixiong Liu, George P. Grab, Mark S. Greenfield | 2003-10-28 |