Issued Patents 2018
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9963937 | Method and apparatus for controlling downhole rotational rate of a drilling tool | Jonathan Ryan Prill, Ralph William Graeme Johns | 2018-05-08 |
| 9957961 | Concentric rotary fluid machine | Jeffery Ronald Clausen | 2018-05-01 |
| RE46746 | Mud-lubricated bearing assembly with mechanical seal | Jonathan Ryan Prill | 2018-03-06 |