Issued Patents All Time
Showing 1–18 of 18 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12311990 | Grade crossing control system and method for determining track circuit impedance | — | 2025-05-27 |
| 12065181 | Tamperproof gate mechanism | Daniel Spencer, Richard C. Bohme | 2024-08-20 |
| 11866076 | Track circuit with continued distance monitoring and broken rail protection | Holger Schmidt, Brian Harp, A. Nathan Edds | 2024-01-09 |
| 11543243 | System and method for determining alignment for railway wayside signal applications | Justin M. Panuski, Daniel Spencer | 2023-01-03 |
| 11104362 | System and method for controlling signaling devices along railroad tracks in electrified territory | A. Nathan Edds, Richard Bamfiield | 2021-08-31 |
| 10710616 | Railroad track powered measurement device and railroad measurement system | — | 2020-07-14 |
| 10698038 | Multichannel ground fault tester | — | 2020-06-30 |
| 10507852 | Warm or hot standby track card module for use on a wayside of a railway system | Holger Schmidt | 2019-12-17 |
| 10349503 | Lamp driver card to control lighting of a lamp load or a LED on a wayside of a railway system | Holger Schmidt | 2019-07-09 |
| 10017196 | Wireless crossing warning activation and monitoring | — | 2018-07-10 |
| 9912143 | Hot standby for lamp driver | Holger Schmidt | 2018-03-06 |
| 9248848 | Wireless and/or wired frequency programmable termination shunts | — | 2016-02-02 |
| 9215100 | Isolated data acquisition | — | 2015-12-15 |
| 8899530 | Train direction detection via track circuits | — | 2014-12-02 |
| 8857769 | Variable frequency train detection | — | 2014-10-14 |
| 8792123 | Mechanism for generating personalized mailpieces in a manufacturing system | Dwight Ross Palmer, Scott Jones | 2014-07-29 |
| 8660215 | Decoding algorithm for frequency shift key communications | — | 2014-02-25 |
| 8590844 | Track circuit communications | — | 2013-11-26 |