Issued Patents All Time
Showing 26–30 of 30 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9004199 | Drill bits and methods of manufacturing such drill bits | Gregory T. Lockwood, Jonan Fulencheck, Michael G. Azar | 2015-04-14 |
| 8991523 | Rolling cutter assembled directly to the bit pockets | Yuelin Shen, Youhe Zhang, Michael A. Siracki, Mahavir Nagaraj, Bala Durairajan +2 more | 2015-03-31 |
| 8950518 | Matrix tool bodies with erosion resistant and/or wear resistant matrix materials | Gregory T. Lockwood, Youhe Zhang | 2015-02-10 |
| 8727043 | Cutter assemblies, downhole tools incorporating such cutter assemblies and methods of making such downhole tools | Youhe Zhang, Yuelin Shen, Gregory T. Lockwood | 2014-05-20 |
| 8702825 | Composite cutter substrate to mitigate residual stress | Yuelin Shen, Youhe Zhang, Jibin Shi, Gregory T. Lockwood | 2014-04-22 |