U.S. federal trademark · Serial No. 72119107 · Reg. No. 0742565
CONCRETE BUILDING BLOCKS MADE OF THE USUAL AGGREGATE OR OF SPECIAL LIGHTWEIGHT AGGREGATE, CINDER BLOCKS, LINTELS, AND STRUCTURAL CONCRETE MEMBERS-NAMELY, REINFORCED BEAMS, SLABS, COLUMNS AND PILES, WHETHER PRE-STRESSED OR NOT
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