Patent classifications
G
PHYSICS
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G08
SIGNALLING
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G08C
TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
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15/00
Arrangements characterised by the use of multiplexing for the transmission of a plurality of signals over a common path
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G08C15/02
simultaneously, i.e. using frequency division
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G08C15/04
the signals being modulated on carrier frequencies
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