Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11021180 | Railway road crossing warning system with sensing system electrically-decoupled from railroad track | Brian Harp, Holger Schmidt, Stefan Fritschi | 2021-06-01 |
| 9671487 | Track test load device and track test load system for calibrating a constant warning time device | Brian Harp | 2017-06-06 |