US PATENT SUBCLASS 370 / 481
.~.~ Multiple frequency translations

Current as of: June, 1999
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370 /   HD   MULTIPLEX COMMUNICATIONS

464  DF  COMMUNICATION TECHNIQUES FOR INFORMATION CARRIED IN PLURAL CHANNELS {9}
480  DF  .~ Combining or distributing information via frequency channels {11}
481.~.~ Multiple frequency translations

DEFINITION

Classification: 370/481

Multiple frequency translations:

(under subclass 480) Subject matter wherein a group of signals occupying a definite frequency band is transferred from one position in the frequency spectrum to another in such a way that the arithmetic frequency difference of signals within the band is unaltered.