US PATENT SUBCLASS 380 / 13
.~.~ Carrier frequency conversion

Current as of: June, 1999
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380 /   HD   CRYPTOGRAPHY

9  DF  ELECTRIC SIGNAL MODIFICATION (E.G., SCRAMBLING) {18}
10  DF  .~ Video {10}
13.~.~ Carrier frequency conversion

DEFINITION

Classification: 380/13

Carrier frequency conversion:

(under subclass 10) Subject matter in which the frequency of a carrier wave is modified for encryption.

SEE OR SEARCH THIS CLASS, SUBCLASS:

38, for similar subject matter used with other than video information.