Issued Patents All Time
Showing 26–46 of 46 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7908851 | Hydraulic energy storage with reinforced layer | David R. Hall, Jacob Hannon, Tyson J. Wilde, Boyd Black | 2011-03-22 |
| 7891453 | Energy storage in an elastic vessel | David R. Hall, Jacob Hannon | 2011-02-22 |
| 7753144 | Drill bit with a retained jack element | David R. Hall, Joe Fox, Tyson J. Wilde, Boyd Black | 2010-07-13 |
| 7694756 | Indenting member for a drill bit | David R. Hall, John Bailey | 2010-04-13 |
| 7690138 | Rolling assembly mounted on a trencher | David R. Hall, Ronald B. Crockett, Jeff Jepson, Tyson J. Wilde | 2010-04-06 |
| 7677036 | Hydraulic energy storage with an internal element | David R. Hall, David Wahlquist | 2010-03-16 |
| 7600376 | Energy storage | David R. Hall, David Wahlquist, Scott Dahlgren | 2009-10-13 |
| 7571780 | Jack element for a drill bit | David R. Hall, Joe Fox, Tyson J. Wilde | 2009-08-11 |
| 7526918 | Hydraulic energy storage with reinforced layer | David R. Hall, Jacob Hannon, Tyson J. Wilde, Boyd Black | 2009-05-05 |
| 7506701 | Drill bit assembly for directional drilling | David R. Hall, Scott Dahlgren, David Lundgreen, Daryl Wise | 2009-03-24 |
| 7506706 | Retaining element for a jack element | David R. Hall, Joe Fox, Tyson J. Wilde, Boyd Black | 2009-03-24 |
| 7475948 | Pick with a bearing | David R. Hall, Ronald B. Crockett, Jeff Jepson | 2009-01-13 |
| 7469971 | Lubricated pick | David R. Hall, Ronald B. Crockett, Jeff Jepson | 2008-12-30 |
| 7426968 | Drill bit assembly with a probe | David R. Hall, Paula Turner, Christopher Durrand, David Lundgreen, Daryl Wise | 2008-09-23 |
| 7419016 | Bi-center drill bit | David R. Hall, Scott Dahlgren, Tyson J. Wilde | 2008-09-02 |
| 7398837 | Drill bit assembly with a logging device | David R. Hall, Christopher Durrand, Paula Turner | 2008-07-15 |
| 7360610 | Drill bit assembly for directional drilling | David R. Hall, Scott Dahlgren, David Lundgreen, Daryl Wise | 2008-04-22 |
| 7337858 | Drill bit assembly adapted to provide power downhole | David R. Hall | 2008-03-04 |
| 7328755 | Hydraulic drill bit assembly | David R. Hall, Scott Dahlgren | 2008-02-12 |
| 7198119 | Hydraulic drill bit assembly | David R. Hall, Scott Dahlgren | 2007-04-03 |
| 7179018 | Apparatus and method for working asphalt pavement | David R. Hall, Robert P. Chase, Jr., Garret Smith, Matthew Adam Hellewell, Joe Fox | 2007-02-20 |