Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5606124 | Apparatus and method for determining the gravitational orientation of a well logging instrument | David M. Chace, Dennis Roessler, John T. Evans, Paul Bergren | 1997-02-25 |
| 5594344 | Method and apparatus for generating and detecting amplitude and phase modulated sensor signals | John T. Evans | 1997-01-14 |