Issued Patents 2003
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6510909 | Rolling cone bit with gage and off-gage cutter elements positioned to separate sidewall and bottom hole cutting duty | Gary R. Portwood, Gary E. Garcia, James C. Minikus, Dennis Cisneros, Chris E. Cawthorne | 2003-01-28 |