US Patent Class 342-- COMMUNICATIONS: DIRECTIVE RADIO WAVE SYSTEMS AND DEVICES (E.G., RADAR, RADIO NAVIGATION)-- MAIN HEADINGS

US Patent Class 342
COMMUNICATIONS: DIRECTIVE RADIO WAVE SYSTEMS AND DEVICES (E.G., RADAR, RADIO NAVIGATION)-- Main Headings

		CLASS NOTES
1	DF	RADIO WAVE ABSORBER {3}
5	DF	RADAR REFLECTOR {5}
13	DF	RADAR EW (ELECTRONIC WARFARE) {3}
21	DF	BASE BAND SYSTEM
22	DF	TRANSMISSION THROUGH MEDIA OTHER THAN AIR OR FREE SPACE
23	DF	BERTHING OR DOCKING
24	DF	BLIND AID
25	DF	SYNTHETIC APERTURE RADAR
26	DF	WEATHER RADAR
27	DF	PRESENCE DETECTION ONLY {1}
29	DF	AIRCRAFT COLLISION AVOIDANCE SYSTEM (CAS) {1}
33	DF	AIRCRAFT LANDING SYSTEM {2}
36	DF	AIR TRAFFIC CONTROL {1}
41	DF	SHIP COLLISION AVOIDANCE
42	DF	RADAR TRANSPONDER SYSTEM {6}
52	DF	COMBINED WITH DIVERSE TYPE RADIANT ENERGY SYSTEM {6}
59	DF	PLURAL RADAR
60	DF	TRANSMITTING INTELLIGENCE
61	DF	RETURN SIGNAL CONTROLS EXTERNAL DEVICE {7}
73	DF	RETURN SIGNAL CONTROLS RADAR SYSTEM {3}
104	DF	DETERMINING VELOCITY {9}
118	DF	DETERMINING DISTANCE {11}
147	DF	DETERMINING DIRECTION {6}
159	DF	CLUTTER ELIMINATION {1}
165	DF	TESTING OR CALIBRATING OF RADAR SYSTEM {5}
175	DF	WITH PARTICULAR CIRCUIT {13}
350	DF	DIRECTIVE {10}
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		FOREIGN ART COLLECTIONS
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*	DF	DIRECTIVE {1}