| 12240047 |
Quick-release coupling for drilling and related methods |
Timothy D. Burgess, William A. Burgess, Lyle Abraham Crum |
2025-03-04 |
| 11213900 |
Quick-release coupling for drilling and related methods |
Timothy D. Burgess, William A. Burgess, Lyle Abraham Crum |
2022-01-04 |
| 8881847 |
Dust collecting device for a roof tool |
Chad A. Swope |
2014-11-11 |
| 8807248 |
Cutting insert for a roof drill bit |
Seth Daniel Colvin, Chad A. Swope |
2014-08-19 |
| 8002054 |
Roof drill bit, roof drill bit body and hard cutting insert for roof drill bit |
Chad A. Swope, Kris Strothmann, Tod D. Hill |
2011-08-23 |
| 7708087 |
Countersink roof bit drill and method for using the same |
Brandon S. Stables, John G. Oldsen, Donald E. Keller, David Rife, John C. Stankus +1 more |
2010-05-04 |
| 7207400 |
Coupler and roof drill bit assembly using such coupler |
Joseph C. Boggs |
2007-04-24 |
| 6945340 |
Roof bit and insert assembly |
Phillip W. Haga, Ted R. Massa |
2005-09-20 |
| 6915867 |
Earth penetrating rotary drill bit with helical ports |
— |
2005-07-12 |
| 6886645 |
Liquid seal for wet roof bit |
Phillip W. Haga |
2005-05-03 |
| 6860344 |
Monolithic roof cutting bit insert |
Phillip W. Haga |
2005-03-01 |
| 6684968 |
Roof bit body and insert assembly |
Phillip W. Haga, Ted R. Massa |
2004-02-03 |
| 6595305 |
Drill bit, hard member, and bit body |
Curnie A. Dunn, Phillip W. Haga, Ted R. Massa, Gary Condon, Stephen T. Belsheim +1 more |
2003-07-22 |
| 6244665 |
Cutting toolholder with recessed groove for cutting tool removal |
Phillip W. Haga, Randall W. Oianen |
2001-06-12 |
| 5529384 |
Bit holder block and cutter bit therefor |
Randall W. Ojanen |
1996-06-25 |