Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6810955 | Gas lift mandrel | Roger D. Hegdahl, James H. Kritzler | 2004-11-02 |
| 6782952 | Hydraulic stepping valve actuated sliding sleeve | Thomas W. Garay, Edward Zisk | 2004-08-31 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6810955 | Gas lift mandrel | Roger D. Hegdahl, James H. Kritzler | 2004-11-02 |
| 6782952 | Hydraulic stepping valve actuated sliding sleeve | Thomas W. Garay, Edward Zisk | 2004-08-31 |