U.S. federal trademark · Serial No. 72152080 · Reg. No. 0750448
ELECTRONIC AND ELECTRO-MECHANICAL EQUIPMENTS FOR THE TELEPHONE INDUSTRY-NAMELY, TELEPHONE DOOR ANSWERING, DOOR OPENING, HOME INTERPHONE, LINE AND RINGER ISOLATION, SATURABLE REACTOR, AMPLIFIER, DETECTOR, OSCILLATOR, TONE RINGER, PAGING AMPLIFIER, HEADSET AND SPEAKERPHONE ADAPTOR, SIGNAL BUZZER APPARATUS
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