Issued Patents 2018
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9909396 | Erosion reduction in subterranean wells | Thomas Jules Frosell, Michael Linley Fripp, Ralph H. Echols | 2018-03-06 |
| 9869157 | Reverse circulation cementing system for cementing a liner | Gary Allen Kohn, Arthur Stautzenberger, Richard Paul Noffke, Grant Lynn Hartman, Stephen Ross Maddux +3 more | 2018-01-16 |