U.S. federal trademark · Serial No. 78141444 · Reg. No. 2972720
PUBLIC-ADDRESS SYSTEMS COMPRISED OF MICROPHONES, LOGIC CIRCUITS, AMPLIFIERS, AUDIO PROCESSORS, AUDIO SWITCHERS, AUDIO ROUTERS, DIGITAL AUDIO PROCESSORS, DIGITAL ATTENUATORS, MICROCOMPUTERS, AND AUTOMATIC INTEGRITY TESTING EQUIPMENT; AND INSTRUCTIONAL MANUALS SOLD AS A UNIT
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