(under subclass 870.11) Subject matter whereby the transmission of data involving two or more quantities on a common transmission medium is accomplished by modulation of carriers of different frequencies.
(1) Note. Differing segments need not be associated on a one-to-one basis with the information channels.
SEE OR SEARCH THIS CLASS, SUBCLASS:
825+, for plural band selective systems in general.
855.3, for signal multiplexing in a wellbore telemetering system.
SEE OR SEARCH CLASS
370, Multiplex Communications, appropriate subclasses for combining or distributing information via frequency channels in multiplex communications in general.
