U.S. federal trademark · Serial No. 71533946 · Reg. No. 0514957
TELEPHONIC RECEIVING AND TALKING INSTRUMENTS, TELEPHONIC SWITCHBOARDS, TELEPHONIC CENTRAL EXCHANGE APPARATUS, TELEPHONE LINE APPARATUS FOR INTERCONNECTING SAID RECEIVING AND TALKING INSTRUMENTS WITH SAID CENTRAL EXCHANGE, APPARATUS, AND PARTS THEREOF; AND SOUND SYSTEMS-NAMELY, INTERCOMMUNICATING SYSTEMS OF THE INTEROFFICE TELEPHONIC TYPE, AND PARTS THEREOF
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