U.S. federal trademark · Serial No. 76024968 · Reg. No. 2557929
MICROPHONE AND DIGITAL SIGNAL PROCESSING CIRCUITRY THAT MAINTAIN THE PERCEIVED SOUND LEVEL SUBSTANTIALLY UNIFORM IN THE PRESENCE OF NOISE LEVEL CHANGES SOLD AS A COMPONENT PART OF VEHICLE SOUND SYSTEMS AND SOLD DIRECTLY TO VEHICLE MANUFACTURERS FOR INSTALLATION AS ORIGINAL EQUIPMENT IN VEHICLES
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