Issued Patents All Time
Showing 1–25 of 42 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9903162 | Spacing of rolling cutters on a fixed cutter bit | Michael G. Azar | 2018-02-27 |
| 9482058 | Cutting structures and structures for retaining the same | — | 2016-11-01 |
| 8991523 | Rolling cutter assembled directly to the bit pockets | Yuelin Shen, Youhe Zhang, Yuri Burhan, Mahavir Nagaraj, Bala Durairajan +2 more | 2015-03-31 |
| 7690446 | Single cone rock bit having inserts adapted to maintain hole gage during drilling | George Witman, Peter Wilson, Scott D. McDonough | 2010-04-06 |
| 7401668 | Single cone rock bit having inserts adapted to maintain hole gage during drilling | George Witman, Peter Wilson, Scott D. McDonough | 2008-07-22 |
| 7387178 | Self relieving seal | James L. Neville, James L. Larsen, Steven W. Peterson, Manikiran Bandi, Alan W. Lockstedt +3 more | 2008-06-17 |
| 7229077 | Ordered elastomeric composite material | Madapusi K. Keshavan, Anthony Griffo, Alysia C. White, Robert Denton, Patricia Heel +1 more | 2007-06-12 |
| 7201241 | Self relieving seal | James L. Neville, James L. Larsen, Steven W. Peterson, Manikiran Bandi, Alan W. Lockstedt +3 more | 2007-04-10 |
| 7188682 | Multi-stage diffuser nozzle | James L. Larsen, Godwin Apeh Gabriel, Dwayne P. Terracina | 2007-03-13 |
| 7100711 | Single cone rock bit having inserts adapted to maintain hole gage during drilling | George Witman, Peter Wilson, Scott D. McDonough | 2006-09-05 |
| 7032693 | Preformed tooth for tooth bit | — | 2006-04-25 |
| 6976548 | Self relieving seal | James L. Neville, James L. Larsen, Steven W. Peterson, Manikiran Bandi, Alan W. Lockstedt +3 more | 2005-12-20 |
| 6863138 | High offset bits with super-abrasive cutters | — | 2005-03-08 |
| 6719073 | Single-cone rock bit having cutting structure adapted to improve hole cleaning, and to reduce tracking and bit balling | Ying Xiang, George Witman | 2004-04-13 |
| 6651757 | Toughness optimized insert for rock and hammer bits | Dan Belnap, Nathan R. Anderson, Sujian Huang | 2003-11-25 |
| 6571887 | Directional flow nozzle retention body | Quan Nguyen, James L. Larsen, Chris E. Cawthorne | 2003-06-03 |
| 6484826 | Engineered enhanced inserts for rock drilling bits | Nathan R. Anderson, J. Daniel Belnap, Chris E. Cawthorne, Ronald K. Eyre, Madapusi K. Keshavan +2 more | 2002-11-26 |
| 6460637 | Engineered enhanced inserts for rock drilling bits | Chris E. Cawthorne, Per Ivar Nese, Madapusi K. Keshavan, J. Daniel Belnap, Ronald K. Eyre +1 more | 2002-10-08 |
| 6460636 | Drill bit inserts with variations in thickness of diamond coating | Zhou Yong, Suprant J. Huang, Nathan R. Anderson, J. Daniel Belnap, Chris E. Cawthorne +4 more | 2002-10-08 |
| 6419034 | Engineered enhanced inserts for rock drilling bits | J. Daniel Belnap, Ronald K. Eyre, Per Ivar Nese, Madapusi K. Keshavan, Nathan R. Anderson | 2002-07-16 |
| 6361873 | Composite constructions having ordered microstructures | Zhou Yong, Sujian Huang, Chris E. Cawthorne, J. Albert Sue, Ghanshyam Rai +1 more | 2002-03-26 |
| 6345673 | High offset bits with super-abrasive cutters | — | 2002-02-12 |
| 6336512 | Drill bit having canted seal | Steven W. Peterson, Chris E. Cawthorne, Quan Nguyen | 2002-01-08 |
| 6311793 | Rock bit nozzle and retainer assembly | James L. Larsen | 2001-11-06 |
| 6290008 | Inserts for earth-boring bits | Gary R. Portwood | 2001-09-18 |