Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8905163 | Rotary drill bit with improved steerability and reduced wear | Shilin Chen | 2014-12-09 |
| 8356679 | Rotary drill bit with gage pads having improved steerability and reduced wear | Shilin Chen | 2013-01-22 |
| 8051923 | Rotary drill bits with gage pads having improved steerability and reduced wear | Shilin Chen | 2011-11-08 |