Issued Patents 2011
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7963326 | Method and apparatus for utilizing pressure signature in conjunction with fall time as indicator in oil and gas wells | — | 2011-06-21 |
| 7878251 | Multiple stage tool for use with plunger lift | Paul T. Roberts | 2011-02-01 |