US PATENT SUBCLASS 342 / 56
.~ With direction finding

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

52  DF  COMBINED WITH DIVERSE TYPE RADIANT ENERGY SYSTEM {6}
56.~ With direction finding

DEFINITION

Classification: 342/56

With direction finding:

(under subclass 52) Subject matter including a device used to determine the direction of arrival of remotely transmitted radio signals.

SEE OR SEARCH THIS CLASS, SUBCLASS:

107+, and 113, for radar device or systems which determine velocity and direction.

133, 139+ and 146, for radar devices or systems which determine distance and direction.

147+, for radar direction finding, per se.

350+, for radio wave direction finding devices or system other than radar devices or systems.