Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7331410 | Drill bit arcuate-shaped inserts with cutting edges and method of manufacture | Zhou Yong, Armardeep Singh, Quan Nguyen, Sharath K. Kolachalam | 2008-02-19 |
| 6823951 | Arcuate-shaped inserts for drill bits | Zhou Yong, Amardeep Singh | 2004-11-30 |