U.S. federal trademark · Serial No. 71601820 · Reg. No. 0574190
CORRUGATED PAPER IN SHEET FORM THAT HAS BEEN HARDENED AND STRENGTHENED BY IMPREGNATION WITH AN INTROFYING AGENT SUCH AS SULPHUR, THE SAME BEING USED BY VIRTUE OF ITS STURDINESS AS A RAW MATERIAL FOR THE BUILDING TRADES, FOR THE CONSTRUCTION OF STIFF-WALLED CONTAINERS,FOR RIGID PARTITIONS, DIVIDERS, ETC
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