Issued Patents All Time
Showing 76–86 of 86 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7862634 | Polycrystalline composites reinforced with elongated nanostructures | J. Daniel Belnap, Guodong Zhan, Xiayang Sheng, Youhe Zhang, Madapusi K. Keshavan +1 more | 2011-01-04 |
| 7836981 | Thermally stable polycrystalline diamond cutting elements and bits incorporating the same | Youhe Zhang, Madapusi K. Keshavan, Michael G. Azar | 2010-11-23 |
| 7798257 | Shaped cutter surface | Youhe Zhang, Zhou Yong | 2010-09-21 |
| 7757785 | Modified cutters and a method of drilling with modified cutters | Youhe Zhang | 2010-07-20 |
| 7740090 | Stress relief feature on PDC cutter | John Y. Zhang | 2010-06-22 |
| 7726420 | Cutter having shaped working surface with varying edge chamfer | Youhe Zhang, Steffen S. Kristiansen | 2010-06-01 |
| 7717199 | Cutting elements and bits incorporating the same | Zan Svendsen, Youhe Zhang | 2010-05-18 |
| 7703559 | Rolling cutter | Youhe Zhang, Zhou Yong, Jiaqing Yu, Madapusi K. Keshavan | 2010-04-27 |
| 7533740 | Thermally stable polycrystalline diamond cutting elements and bits incorporating the same | Youhe Zhang, Madapusi K. Keshavan, Mike Azar | 2009-05-19 |
| 7493973 | Polycrystalline diamond materials having improved abrasion resistance, thermal stability and impact resistance | Madapusi K. Keshavan, Youhe Zhang, Anthony Griffo, Michael Janssen | 2009-02-24 |
| 7287610 | Cutting elements and bits incorporating the same | Zan Svendsen, Youhe Zhang | 2007-10-30 |