74145595
Mar 6, 1991
Jun 15, 1993
optoelectronic communication systems comprising fiber optical cables, laser generating and detecting apparatus for surveying purposes, laser operated remote control, process monitoring; and control systems comprising transmitters and receivers and parts thereof; namely, optical transmitters and receivers, optical lines, optical switches, optical connectors, optical filters, optical multiplexers and demultiplexers, optical star couplers, optical attenuators; intercom systems comprising transmitters and receivers
Electrical and Scientific Apparatuscustom manufacture of communications installations and installation, repair, and maintenance
Treatment of Materials