Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D951322 | Camera | Zhenmei Mao, Xuan Song | 2022-05-10 |
| 8195438 | Method for designing cutting structure for roller cone drill bits | Amardeep Singh, Sujian Huang | 2012-06-05 |
| 6719073 | Single-cone rock bit having cutting structure adapted to improve hole cleaning, and to reduce tracking and bit balling | George Witman, Michael A. Siracki | 2004-04-13 |
| 6651758 | Rolling cone bit with elements fanned along the gage curve | James C. Minikus | 2003-11-25 |
| 6612384 | Cutting structure for roller cone drill bits | Amardeep Singh, Sujian Huang | 2003-09-02 |
| 6601660 | Cutting structure for roller cone drill bits | Amardeep Singh, Sujian Huang | 2003-08-05 |
| 6561291 | Roller cone drill bit structure having improved journal angle and journal offset | — | 2003-05-13 |