Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10648274 | Apparatus and method for opening and closing in multiple cycles a downhole sleeve using an intervention tool | John M. Hughes, James Wilburn Schmidt | 2020-05-12 |
| 9556714 | Liner hanger and method for installing a wellbore liner | John M. Hughes, James Wilburn Schmidt | 2017-01-31 |
| 7861781 | Pump down cement retaining device | — | 2011-01-04 |