U.S. federal trademark · Serial No. 88408671 · Reg. No. 017978794
Grinding machines for sharpening tungsten carbide buttons in the nature of cutting teeth on drill bits for percussive or rotary rock drilling, tunnel boring machine cutters and raised bore machine cutters; machine parts, namely, grinding cups for detachable connection to a grinding machine for sharpening tungsten carbide buttons in the nature of cutting teeth on rock drill bits, tunnel boring machine cutters and raised bore machine cutters
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