Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8348202 | Railroad switch machine | — | 2013-01-08 |
| 7464904 | Method and system providing sleep and wake-up modes for railway track circuit unit | Richard W. Vehar | 2008-12-16 |
| 7296770 | Electronic vital relay | — | 2007-11-20 |
| 6494409 | Railway code following apparatus | — | 2002-12-17 |
| 6484974 | Controller for switch machine | Robert P. Bozio, Leonard Wydotis | 2002-11-26 |
| 6382567 | Railway switch machine point detection system | — | 2002-05-07 |
| 6366041 | Railway switch machine motor control apparatus | Robert P. Bozio | 2002-04-02 |
| 6300734 | Motor control apparatus for a railway switch machine | Robert P. Bozio, Leonard Wydotis | 2001-10-09 |
| 6296208 | Railway switch machine point detection system | — | 2001-10-02 |
| 6108220 | Solid state fail-safe control of an AC load utilizing synchronous switching | — | 2000-08-22 |
| 5459663 | Cab signal apparatus and method | — | 1995-10-17 |
| 5263670 | Cab signalling system utilizing coded track circuit signals | Michael Edward Colbaugh | 1993-11-23 |
| 5145131 | Master-Satellite railway track circuit | — | 1992-09-08 |
| 4723738 | Railway track circuit for electrified territory including impedance bonds and insulated joints | — | 1988-02-09 |
| 4723739 | Synchronous rectification track circuit | — | 1988-02-09 |