U.S. federal trademark · Serial No. 75666908 · Reg. No. 2329248
FREQUENCY SELECTIVE ELECTRONIC CROSSOVER FILTERING APPARATUS AND ELECTRONIC MUSICAL INSTRUMENT AMPLIFIER WITH BUILT-IN FREQUENCY SELECTIVE ELECTRONIC CROSSOVER FILTERING APPARATUS TO FACILITATE BASS FREQUENCY SOUND REPRODUCTION AND BASS ACOUSTIC SPEAKERS ESPECIALLY ADAPTED FOR USE WITH THE CROSSOVER FILTERING APPARATUS
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