U.S. federal trademark · Serial No. 79176808 · Reg. No. 4948719
Fireclay bricks; refractory bricks containing chrome-corundum; refractory bricks containing zircon oxide; refractory bricks containing alumina and magnesia spinel; acid resisting bricks; pre-cast blocks, namely, bricks as building units; refractory components, namely, refractory bricks, refractory cement, refractory concrete, refractor blocks not of metal, and refractor construction materials not of metal, as building materials; insulating fire bricks
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