(under subclass 276) Subject matter including circuitry for compensating for attenuation losses of duplex signals or for increasing the communication range for extension terminal equipment at either end of a duplex transmission line.
SEE OR SEARCH CLASS
178, Telegraphy,
70+, for a teles:graphic nonmultiplex repeater.
330, Amplifiers, for an amplifier which may be used as a repeater.
379, Telephonic Communications,
338+, for a telephonic nonmultiplex repeater.
455, Telecommunications, 7+, for a nonmultiplex telecommunication repeater system.
