Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7861805 | Conformal bearing for rock drill bit | Aaron J. Dick, Chih Lin, Anton F. Zahradnik, Dan E. Scott, Don Q. Nguyen +4 more | 2011-01-04 |
| 6450271 | Surface modifications for rotary drill bits | Gordon A. Tibbitts, Danny E. Scott, James L. Overstreet, Chih Lin, James Andy Oxford +1 more | 2002-09-17 |