Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9162691 | System and method for detecting broken rail and occupied track from a railway vehicle | Alan L. Polivka, Brian Eric Smith, Steven Mark Renfrow | 2015-10-20 |
| 9102341 | Method for detecting the extent of clear, intact track near a railway vehicle | Alan L. Polivka | 2015-08-11 |