About 2 Trademarks found that are filed by the law firm The Signal Source

Automotive, industrial, construction, locomotive, aviation, navigation and marine safety-warning lights namely, strobes, rotating lights and bar lights; Electronic warning bells; Electronic warning horn; Emergency signal transmittors; Emergency warning lights; Fire alarm and emergency evacuation devices, namely, fire alarm control panels, smoke detectors, heat detectors, alarm pull stations, audible and visible notification appliances, strobes, sirens, bells, horns, and speakers; Fire alarms; Fire and smoke detectors; Smoke alarms

The mark consists of the stylized letters "TSS" and words "THE SIGNAL SOURCE" both shown in gold and an eight-pointed star appearing in blue.