Issued Patents 2002
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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 |
| 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 |
| 6431293 | Dual-seal drill bit pressure communication system | Chris E. Cawthorne, Robert H. Slaughter, Jr., Roger Didericksen, Peter Thomas Cariveau, Robert Denton | 2002-08-13 |
| 6422327 | Drill bit with ridge-cutting cutter elements | J. Albert Sue | 2002-07-23 |
| 6390210 | Rolling cone bit with gage and off-gage cutter elements positioned to separate sidewall and bottom hole cutting duty | Gary E. Garcia, James C. Minikus, Per Ivar Nese, Dennis Cisneros, Chris E. Cawthorne | 2002-05-21 |
| 6367568 | Steel tooth cutter element with expanded crest | Stephen C. Steinke, Gary E. Garcia, David P. Moran, Quan Nguyen | 2002-04-09 |