U.S. federal trademark · Serial No. 75112260 · Reg. No. 2131822
alarm systems, comprising electronic audio signallers, electronic video signallers, electronic motion sensors, electronic switches for detecting motion, and connecting electrical wiring, for arrangement about doorways and throughways for alerting a vehicle being driven or the load being carried exceeds the size of the opening defined by the doorway or throughway so as to prevent damage thereto
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