Assignee
Inventors
- Brent Keeth (333 patents)
- Layne Bunker (40 patents)
- Scott J. Demer (1 patents)
- Ronald Taylor (32 patents)
- John S. Mullin (6 patents)
- Raymond J. Beffa (58 patents)
- Frank F. Ross (61 patents)
- Larry D. Kinsman (233 patents)
US Patent 7969810 · Granted Jun 28, 2011