73448558
Oct 18, 1983
Oct 16, 1984
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
Electrical and Scientific Apparatus