Issued Patents 2004
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6827161 | Roller cone drill bit having non-axisymmetric cutting elements oriented to optimize drilling performance | Sujian Huang, Scott D. McDonough | 2004-12-07 |
| 6823951 | Arcuate-shaped inserts for drill bits | Zhou Yong, Jim Minikus | 2004-11-30 |
| 6786288 | Cutting structure for roller cone drill bits | — | 2004-09-07 |
| 6725952 | Bowed crests for milled tooth bits | — | 2004-04-27 |
| 6688410 | Hydro-lifter rock bit with PDC inserts | Quan Nguyen, Sujian Huang | 2004-02-10 |