US PATENT SUBCLASS 342 / 20
.~ Detection of surveilance

Current as of: June, 1999
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342 /   HD   COMMUNICATIONS: DIRECTIVE RADIO WAVE SYSTEMS AND DEVICES (E.G., RADAR, RADIO NAVIGATION)

13  DF  RADAR EW (ELECTRONIC WARFARE) {3}
20.~ Detection of surveilance

DEFINITION

Classification: 342/20

Detection of surveillance:

(under subclass 13) Subject matter including means to indicate only the presence of systematic radio signal observation means.

(1) Note. This subclass includes devices commonly called "Fuzzbuster".