Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7713246 | Automatic valve | Benedict Shia, Rork Swisher, James G. Hanlon, Glenn Fournie, Robert Coon +3 more | 2010-05-11 |
| 4449582 | Sequenced production incorporating fluid rod pump | John W. Erickson, Horace M. Robinson | 1984-05-22 |
| 4436492 | Surface power unit for a downhole pump | John W. Erickson | 1984-03-13 |
| 4425083 | Velocity actuated valve for a downhole pump | John W. Erickson | 1984-01-10 |
| 4425086 | Combined surface power unit and velocity actuated valve for a downhole pump | John W. Erickson | 1984-01-10 |