Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6950056 | Methods and apparatus for determination of a filter center frequency | James R. Hager, Thomas W. Heidemann | 2005-09-27 |
| 6897804 | Methods and apparatus for determination of a filter center frequency | James R. Hager, Thomas W. Heidemann | 2005-05-24 |
| 6744397 | Systems and methods for target location | James R. Hager, Larry D. Almsted | 2004-06-01 |
| 6323441 | Ultrasonic distance measuring system for monitoring railroad car loads | James R. Hager, Curtis J. Petrich | 2001-11-27 |
| 6175784 | Remotely operated rail car status monitor and control system | Randy W. Lokken | 2001-01-16 |