U.S. federal trademark · Serial No. 71549002 · Reg. No. 0562120
PROTECTED SHEET-METAL ELECTRIC WIRING CONDUITS FOR USE IN ENCLOSING THE WIRES OF THE WIRING SYSTEM THEREIN TO PROTECT THE SAME FROM THE WEATHER, AND FURTHER TO PROVIDE A CONCEALED FIREPROOF WIRING SYSTEM WITHIN A BUILDING
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