Issued Patents 2011
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8050879 | Phase identification system and method | Glen Peter Koste, John Erik Hershey, Pierino Gianni Bonanni, Amol Rajaram Kolwalkar | 2011-11-01 |
| 7954770 | Methods and system for jointless track circuits using passive signaling | John Erik Hershey, Jeffrey Michael Fries | 2011-06-07 |