Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8322467 | Cutting element having stress reduced interface | Yuelin Shen | 2012-12-04 |
| 7395884 | High-strength/high toughness alloy steel drill bit blank | Kumar T. Kembaiyan, Thomas W. Oldham | 2008-07-08 |
| 7044243 | High-strength/high-toughness alloy steel drill bit blank | Kumar T. Kembaiyan, Thomas W. Oldham | 2006-05-16 |
| 6698538 | Drill bit having adjustable total flow area | Steffen S. Kristiansen, Michael G. Azar | 2004-03-02 |