U.S. federal trademark · Serial No. 71613895 · Reg. No. 0557391
SPRING DRIVEN GONGS THAT ARE ELECTRICALLY CONTROLLED AND TRIPPED, GONGS THAT ARE OPERATED BY SOLENOIDS OR ELECTROMAGNETS OR THE LIKE, AND GONGS WHICH ARE OPERATED BY ELECTRIC MOTORS AND WHICH ARE OF THE TYPE USED ON RAILWAY CROSSINGS, BRIDGES AND THE LIKE
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