Patents per Year
Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5782608 | Method and apparatus for controlling a progressing cavity well pump | — | 1998-07-21 |
| 5167490 | Method of calibrating a well pumpoff controller | Douglas M. Crume | 1992-12-01 |
| 5064348 | Determination of well pumping system downtime | Douglas M. Crume | 1991-11-12 |
| 4973226 | Method and apparatus for controlling a well pumping unit | — | 1990-11-27 |
| 4738313 | Gas lift optimization | — | 1988-04-19 |
| 4509552 | Gas gun for determining the liquid level of a well | Dean A. Eicher | 1985-04-09 |
| 4268228 | Hydraulic pumping unit | — | 1981-05-19 |