US PATENT SUBCLASS 380 / 6
ELECTRIC SIGNAL MASKING


Current as of: June, 1999
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380 /   HD   CRYPTOGRAPHY

6ELECTRIC SIGNAL MASKING {2}
7  DF  .~> Video
8  DF  .~> By signal having discrete step amplitude variation


DEFINITION

Classification: 380/6

ELECTRIC SIGNAL MASKING:

(under the class definition) Subject matter wherein the characteristics of an information bearing electric signal are obscured by the addition of an extraneous interfering signal.

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9+, for signal encryption by scrambling or other modification.

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455, Telecommunications,

1, for jamming of a modulated carrier wave signal.