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H04J9/00—Multiplex systems in which each channel is represented by a different type of modulation of the carrier
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FR998273D1949-10-271949-10-27
Method of transmitting two channels on the same carrier wave, transmitters and receivers for its implementation
ExpiredFR998273A
(en)
Method for synchronizing transmitter and receiver of stereophonic transmission by pulse amplitude modulation, and installation for carrying out this method or similar method