Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10416330 | Composite transducer for downhole ultrasonic imaging and caliper measurement | Roger R. Steinsiek, Douglas J. Patterson, Anjani R. Achanta | 2019-09-17 |
| 7650963 | Acoustic isolator for well logging system | Herbert W. Beimgraben, Charles Hartmann, Douglas J. Patterson | 2010-01-26 |
| 6820716 | Acoustic isolator for well logging system | Herbert W. Beimgraben, Charles Hartmann, Douglas J. Patterson | 2004-11-23 |
| 5160236 | Retractable van side door ramp | Edward M. Redding | 1992-11-03 |