Issued Patents All Time
Showing 26–29 of 29 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5606124 | Apparatus and method for determining the gravitational orientation of a well logging instrument | Mark R. Doyle, Dennis Roessler, John T. Evans, Paul Bergren | 1997-02-25 |
| 5404752 | Method for measuring the velocity of water flow through nested conduits | Darryl E. Trcka | 1995-04-11 |
| 4612439 | Method and apparatus for natural gamma ray well logging | — | 1986-09-16 |
| 4430567 | Method and apparatus for neutron induced gamma ray logging for direct porosity identification | Donald W. Oliver | 1984-02-07 |