Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8172008 | 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 | 2012-05-08 |
| 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 |
| 7954380 | Rotary drill bits and systems for inspecting rotary drill bits | Jeffrey B. Lund, Nicholas J. Lyons, Eric C. Sullivan | 2011-06-07 |
| 7814990 | 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 | 2010-10-19 |
| 7631560 | Methods of inspecting rotary drill bits | Jeffrey B. Lund, Nicholas J. Lyons, Eric C. Sullivan | 2009-12-15 |
| 7096978 | Drill bits with reduced exposure of cutters | Mark W. Dykstra, William Heuser, Michael L. Doster, Theodore E. Zaleski, Jr., Jack T. Oldham +3 more | 2006-08-29 |
| 6935441 | Drill bits with reduced exposure of cutters | Mark W. Dykstra, William Heuser, Michael L. Doster, Theodore E. Zaleski, Jr., Jack T. Oldham +3 more | 2005-08-30 |
| 6779613 | Drill bits with controlled exposure of cutters | Mark W. Dykstra, William Heuser, Michael L. Doster, Theodore E. Zaleski, Jr., Jack T. Oldham +3 more | 2004-08-24 |
| 6460631 | Drill bits with reduced exposure of cutters | Mark W. Dykstra, William Heuser, Michael L. Doster, Theodore E. Zaleski, Jr., Jack T. Oldham +3 more | 2002-10-08 |