U.S. federal trademark · Serial No. 73448558 · Reg. No. 041
OPTICAL TRANSMITTERS AND RECEIVERS, WITH OR WITHOUT DIGITAL MULTIPLEXERS; (( FIBER OPTIC CABLES; )) OPTICAL TRANSMISSION SYSTEMS INCORPORATING AN OPTICAL TRANSMITTER, A (( FIBER-OPTIC CABLE )) AS (( A TRANSMISSION MEDIUM )) AND AN OPTICAL RECEIVER
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