U.S. federal trademark · Serial No. 70038441 · Reg. No. 0038441
CEMENTS, BRICKS, CRUCIBLES, CUPOLAS, FURNACE-BLOCKS, FURNACE-FITTINGS, FURNACE-BOTTOMS, AND RODS FOR USE FOR THE PURPOSE OF THE OXYHYDROGEN LIGHT, ALL COMPOSED CHIEFLY OF CALCINED MAGNESITE
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