Issued Patents 2003
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6615657 | Built-in test procedure for non-intrusive ultrasonic level sensing | Derrick D. Hongerholt, Eric D. Haugen, Greg Seidel | 2003-09-09 |
| 6545946 | Method and apparatus for eliminating substantially false echoes produced by electrical noise induced into high gain receiver circuits | Eric D. Haugen | 2003-04-08 |
| 6536276 | Apparatus and method to non-intrusively measure the level of liquid in a sealed container | Mark R. Koosmann, Derrick D. Hongerholt, Eric D. Haugen, Greg Seidel, Stephen Meyer +1 more | 2003-03-25 |