| 8950517 |
Drill bit with a retained jack element |
David R. Hall, Francis Leany, Joe Fox, Boyd Black |
2015-02-10 |
| 8485609 |
Impact tool |
David R. Hall, Ronald B. Crockett, Scott Dahlgren |
2013-07-16 |
| 8292372 |
Retention for holder shank |
David R. Hall, Jeff Jepson |
2012-10-23 |
| 8281882 |
Jack element for a drill bit |
David R. Hall, Francis Leany, Joe Fox |
2012-10-09 |
| 8261480 |
Rigid composite structure with a superhard interior surface |
David R. Hall, Scott Dahlgren, Ronald B. Crockett, Timothy C. Duke, Joshua Sensinger +1 more |
2012-09-11 |
| 8201892 |
Holder assembly |
David R. Hall, Jeff Jepson |
2012-06-19 |
| 8123302 |
Impact tool |
David R. Hall, Ronald B. Crockett, Scott Dahlgren |
2012-02-28 |
| 8061784 |
Retention system |
David R. Hall, Scott Dahlgren, Jonathan Marshall, Italo Elqueta, Christopher Durrand |
2011-11-22 |
| 8033615 |
Retention system |
David R. Hall, Scott Dahlgren, Jonathan Marshall, Italo Elqueta, Christopher Durrand |
2011-10-11 |
| 8020333 |
Cylinder with polycrystalline diamond interior |
David R. Hall, Ronald B. Crockett, Scott Dahlgren, Timothy C. Duke, Joshua Sensinger +1 more |
2011-09-20 |
| 8007051 |
Shank assembly |
David R. Hall, Ronald B. Crockett, Jeff Jepson, Jad A. Mills, Scott Dahlgren +1 more |
2011-08-30 |
| 7954401 |
Method of assembling a drill bit with a jack element |
David R. Hall, Francis Leany, Joe Fox |
2011-06-07 |
| 7946656 |
Retention system |
David R. Hall, Scott Dahlgren, Jonathan Marshall, Italo Elqueta, Christopher Durrand |
2011-05-24 |
| 7908851 |
Hydraulic energy storage with reinforced layer |
David R. Hall, Francis Leany, Jacob Hannon, Boyd Black |
2011-03-22 |
| 7866585 |
Rotary shaft impactor |
David R. Hall, Ronald B. Crockett, Jeff Jepson |
2011-01-11 |
| 7862126 |
Method of providing a degradation drum |
David R. Hall, Jad A. Mills |
2011-01-04 |
| 7854078 |
Chain assembly |
David R. Hall, Ronald B. Crockett, Sigmar Tobias |
2010-12-21 |
| 7828627 |
O.D. centerless grinding machine |
David R. Hall, Italo Elqueta, Dat Lieu, Nam Lieu |
2010-11-09 |
| 7766998 |
Water extraction apparatus |
David R. Hall, Andrew Gerla, Joshua Larsen |
2010-08-03 |
| 7753144 |
Drill bit with a retained jack element |
David R. Hall, Francis Leany, Joe Fox, Boyd Black |
2010-07-13 |
| 7696900 |
Apparatus for responding to an anomalous change in downhole pressure |
David R. Hall, Joe Fox, Jonathan S. Barlow |
2010-04-13 |
| 7690138 |
Rolling assembly mounted on a trencher |
David R. Hall, Francis Leany, Ronald B. Crockett, Jeff Jepson |
2010-04-06 |
| 7677954 |
O.D. centerless grinding machine |
David R. Hall, Italo Elqueta, Dat Lieu, Nam Lieu |
2010-03-16 |
| 7615149 |
Agitator in a sewer system |
David R. Hall, Benjamin Hillyard |
2009-11-10 |
| 7591607 |
Asphalt recycling vehicle |
David R. Hall, Timothy C. Duke, David Walhquist, Codrin Daranga |
2009-09-22 |
