Issued Patents 2004
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6812811 | Power discriminating systems | Neal G. Skinner, John J. Goiffon, Charles M. Pool | 2004-11-02 |
| 6768214 | Vibration based power generator | Roger L. Schultz, Robert Michael, Paul D. Ringgenberg | 2004-07-27 |
| 6755249 | Apparatus and method for perforating a subterranean formation | Robert C. Pahmiyer, Paul D. Ringgenberg | 2004-06-29 |
| 6684951 | Sand screen with integrated sensors | Henry L. Restarick, Roger L. Schultz | 2004-02-03 |