21 ELECTRONIC AMPLIFIERS, FOR THE AMPLIFICATION OF RADIO, VIDEO AND RADIO FREQUENCIES, PASSIVE SIGNAL HANDLING ELECTRICAL DEVICES AND CIRCUITS TO HANDLE AND PROCESS ELECTRONIC SIGNALS OF D;C;, AUDIO, VIDEO AND RADIO FREQUENCIES, INCLUDING-- SPLITTERS, DIVIDERS, MIXERS, MULTIPLEXERS, MULTICOUPLERS, DIRECTIONAL COUPLERS, [ ISOLATORS, CIRCULATORS, ] ATTENUATORS, MATCHING TRANSFORMERS, BALUNS, AND FILTERS; [ ELECTRONIC COMPONENTS, INCLUDING TUBE SOCKETS AND R;F; INDUCTORS, CHOKES AND TRANSFORMERS; TELEVISION DISTRIBUTION SYSTEMS; TWO-WAY AUDIO COMMUNICATION SYSTEMS FOR CLOSED-CIRCUIT TELEVISION SYSTEMS AND ACCESSORIES FOR TELEVISION DISTRIBUTION END USAGE; AND WALL BRACKET MOUNTS FOR TELEVISION RECEIVERS ]
Trademark: 72182864
