Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6782959 | Cutter element with non-linear, expanded crest | James C. Minikus, Chris E. Cawthorne, Stephen C. Steinke, Gary R. Portwood, Gary E. Garcia +1 more | 2004-08-31 |
| 6688410 | Hydro-lifter rock bit with PDC inserts | Amardeep Singh, Sujian Huang | 2004-02-10 |