Issued Patents 2011
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8066084 | Drilling apparatus with reduced exposure of cutters and methods of drilling | Mark W. Dykstra, William Heuser, Michael L. Doster, Theodore E. Zaleski, Jr., Jack T. Oldham +3 more | 2011-11-29 |
| 7861806 | Shank structure for rotary drill bits | Anton F. Zahradnik, Eric C. Sullivan, R. Scot Smith, Danielle V. Roberts, Alan J. Massey | 2011-01-04 |