Issued Patents 2011
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8079647 | Vibratory milling machine having linear reciprocating motion | Jing James Yao, Thomas J. Oothoudt | 2011-12-20 |
| 8056985 | Vibratory machine | Jing James Yao, Louis E. Silay | 2011-11-15 |
| 8006782 | Sonic drill head | Kristian S. Drivdahl, Todd A. Nevenner, Kenneth Carl Altrichter | 2011-08-30 |
| 7896108 | Dual string orbital drilling system | Charles C. Able | 2011-03-01 |