US PATENT SUBCLASS 455 / 22
.~.~ Plural conversion stages

Current as of: June, 1999
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7  DF  CARRIER WAVE REPEATER OR RELAY SYSTEM (I.E., RETRANSMISSION OF SAME INFORMATION) {12}
20  DF  .~ With frequency conversion {2}
22.~.~ Plural conversion stages

DEFINITION

Classification: 455/22

Plural conversion stages:

(under subclass 20) Subject matter including more than one successive conversion stage.

SEE OR SEARCH CLASS

332, Modulators, especially

108, 119+, 145, and 151+ for plural modulation stage modulators.