Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8171997 | High velocity string for well pump and method for producing well fluid | David L. Olson, Josh Prather, Ray A. Watson | 2012-05-08 |
| 6289990 | Production tubing shunt valve | David L. Olson, Steven K. Tetzlaff | 2001-09-18 |
| 5988992 | Retrievable progressing cavity pump rotor | Steven K. Tetzlaff, Edward C. Kanady, David L. Olson | 1999-11-23 |
| 5842521 | Downhole pressure relief valve for well pump | Steven K. Tetzlaff, Stephen T. Shanahan | 1998-12-01 |
| 5509482 | Perforation trigger bypass assembly and method | David O'Mara | 1996-04-23 |
| 5209651 | Multiple engine deep well pump | John M. Kelleher | 1993-05-11 |
| 5064355 | Multiple engine deep well pump | John M. Kelleher | 1991-11-12 |
| 4631956 | Air deployed oceanographic mooring | Robert G. Walden, Henri O. Berteaux, Leslie W. Bonde, Eric J. Softley, Thomas M. Popp +1 more | 1986-12-30 |