US PATENT SUBCLASS 370 / 210
.~ Fourier transform

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370 /   HD   MULTIPLEX COMMUNICATIONS

203  DF  GENERALIZED ORTHOGONAL OR SPECIAL MATHEMATICAL TECHNIQUES {5}
210.~ Fourier transform

DEFINITION

Classification: 370/210

Fourier transform:

(under subclass 203) Subject matter utilizing a special mathematical relationship that provides a connection between information in the frequency domain and the time domain.

SEE OR SEARCH CLASS

708, Electrical Computers: Arithmetic Processing and Calculating,

403+, for a Fourier transform using an electric digital calculating computer in a nonmultiplex communication.