About 2 Trademarks found that are filed by the law firm Richard Dunning

safety systems comprised of wireless transmitters and receivers for communicating locations of people and railway vehicles; wireless transmitters and receivers; devices for wireless radio transmission and reception; devices for alerting people of proximity of people and railway vehicles

safety systems comprised of wireless sensors for detecting obstacles in railway grade crossings; wireless transmitters and receivers for communicating the detection of obstacles in railway grade crossings; wireless sensors, transmitters, and receivers; sensor devices; devices for wireless radio transmission and reception; devices for alerting people of obstacles in railway grade crossings