U.S. federal trademark · Serial No. 75580578 · Reg. No. 4394433
BONE-CONDUCTION LOUD-SPEAKERS AND GOODS USING THE BONE-CONDUCTION SPEAKERS, NAMELY HEAD SETS, HEADPHONES, AND EAR PLUG RECEIVERS NOT FOR MEDICAL PURPOSES, AND EAR SETS; AND TELECOMMUNICATION MACHINES AND EQUIPMENT AND ELECTRONIC MACHINES AND EQUIPMENT, NAMELY TELEPHONES, RADIOS AND FACSIMILES; AND PARTS FOR ALL OF THE AFOREMENTIONED GOODS
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