Cables for electrical or optical signal transmission; Cables for optical signal transmission; Electronic and optical communications instruments and components, namely, cable television transmitters; Electronic and optical communications instruments and components, namely, optical receivers; Electronic and optical communications instruments and components, namely, optical transceivers; Fiber optic cables; Fiber optic instruments, namely, attenuators, jumper cables, electric connectors, and med...

Apparatus and instruments for measuring, signaling, and checking pressure and temperature in oil wells; sensors and detectors for measuring, signaling, and checking pressure and temperature in oil wells