U.S. federal trademark · Serial No. 72190817 · Reg. No. 0933838
ELECTRICAL AUDIO AMPLIFIERS, TELEPHONE PICKUPS, TELEPHONE AMPLIFIER UNITS, ELECTRICAL INTERCOMMUNICATION SETS, ELECTRIC MEGAPHONES, MICROPHONES AND MICROPHONE CARTRIDGES, EAR PHONES AND HEAD SETS, LOUD SPEAKERS, LOUD SPEAKER VOLUME AND FADER CONTROLS, PLUGS, JACKS AND PATCH CORDS FOR INTERCONNECTING ELECTRONIC COMPONENTS IN SOUND SYSTEMS, ELECTRICAL SOUND SOURCE MIXERS, TELEGRAPH KEYS, AND CODE PRACTICE SETS
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