Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10352106 | Cradle for retention, transportation and rotation of blowout preventer | Shelby Heidemann | 2019-07-16 |
| 9580977 | Blowout preventer transport and handling system | — | 2017-02-28 |
| 9488023 | Blowout preventer storage, transport and lift skid assembly | Shelby Heidemann | 2016-11-08 |
| 9415819 | Rig movement and rotation assembly | — | 2016-08-16 |
| 9016004 | Apparatus for and method of folding a mast or derrick | — | 2015-04-28 |
| 8720128 | Mast assembly with cylinder nested in substructure | — | 2014-05-13 |
| 8381480 | Dual offset derrick | Jason P. Gress | 2013-02-26 |
| 8353132 | Method and apparatus for erection and disassembly of a sectional mast assembly | Paul M. Landis | 2013-01-15 |
| 8250826 | Hingeable derrick | — | 2012-08-28 |
| 8112946 | Articulating mast | — | 2012-02-14 |
| 6910679 | Variable controlled guide device for wireline spooler | John Brittain | 2005-06-28 |
| 6594960 | Method of folding an articulating mast | John Brittain | 2003-07-22 |
| 4598509 | Method and apparatus for raising and lowering a telescoping mast | Homer J. Woolslayer, Cecil Jenkins | 1986-07-08 |