U.S. federal trademark · Serial No. 75534429
DIGITAL HANDS-FREE MICROPHONE SYSTEM, AND COMPONENTS THEREFOR, SOLD INDIVIDUALLY OR AS A UNIT, FOR USE IN CONJUNCTION WITH A PUBLIC ANNOUNCEMENT SYSTEM, THE SYSTEM COMPRISING A DIGITAL HANDS-FREE MICROPHONE HAVING THE CAPABILITY OF RECORDING MESSAGES AND PLAYING BACK MESSAGES OVER THE PUBLIC ADDRESS SYSTEM, A DIGITALLY-PROGRAMMABLE AUDIO AMPLIFIER, AND, OPTIONALLY, A REMOTE CONTROL MICROPHONE ON-OFF SWITCH AND VOLUME CONTROL
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