U.S. federal trademark · Serial No. 72176759 · Reg. No. 0772113
REFRACTORY HARD METALS BEING COMPOUNDS FORMED BY REACTING BORON, CARBON, NITROGEN OR SILICON WITH EACH OTHER OR WITH TRANSITION METALS, SUCH AS TITANIUM, VANADIUM, CHROMIUM, ZIRCONIUM, COLUMBIUM, MOLYBDENUM, HAFNIUM, TANTALUM AND TUNGSTEN
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