Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9128128 | Current sensor | Jeffrey Michael Fries, Jeffery Armstrong, Robert N. Bettis, Bradley Dale Brown, Shawn Clark +4 more | 2015-09-08 |
| 8581499 | Method and system for determining signal state | Jeffrey Michael Fries, Jeffery Armstrong, Robert N. Bettis, Gregory K. Hann, Hsien-Kuo Lin +2 more | 2013-11-12 |
| 7315770 | Railway controller with improved application programming | David J. Wade, Shawn Clark | 2008-01-01 |