U.S. federal trademark · Serial No. 78201897 · Reg. No. 0099140
HEAT TREATMENT OF STEEL AND METALS; COATING OF METALS AND METAL ALLOYS AND CERAMICS IN VACUUM INSTALLATIONS AND PLASMA VACUUM INSTALLATIONS; SURFACE TREATMENT OF METALS, METAL ALLOYS AND CERAMICS; HARDENING OF METALS AND ALLOYS IN A VACUUM; SURFACE TREATMENT OF METALS, METAL ALLOYS AND CERAMICS THROUGH DIFFUSION, IN PARTICULAR NITRATING
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