US Patent Class 340-- COMMUNICATIONS: ELECTRICAL-- MAIN HEADINGS

US Patent Class 340
COMMUNICATIONS: ELECTRICAL-- Main Headings

		CLASS NOTES
850	DF	UNDERWATER {2}
853.1	DF	WELLBORE TELEMETERING OR CONTROL (E.G., SUBSURFACE TOOL GUIDANCE, DATA TRANSFER, ETC.) {14}
870.01	DF	CONTINUOUSLY VARIABLE INDICATING (E.G., TELEMETERING) {15}
901	DF	EXTERNAL CONDITION VEHICLE-MOUNTED INDICATOR OR ALARM {3}
906	DF	OVERRIDE OF TRAFFIC CONTROL INDICATOR BY COMMAND TRANSMITTER
907	DF	TRAFFIC CONTROL INDICATOR {8}
932.2	DF	VEHICLE PARKING INDICATORS
933	DF	VEHICLE DETECTORS {10}
944	DF	PEDESTRIAN GUIDANCE
945	DF	AIRCRAFT ALARM OR INDICATING SYSTEMS {11}
984	DF	WATERCRAFT ALARM OR INDICATING SYSTEMS {3}
988	DF	VEHICLE POSITION INDICATION {3}
425.5	DF	LAND VEHICLE ALARMS OR INDICATORS {11}
146.2	DF	DIGITAL COMPARATOR SYSTEMS
500	DF	CONDITION RESPONSIVE INDICATING SYSTEM {6}
825	DF	SELECTIVE {23}
286.01	DF	SYSTEMS {24}
425.1	DF	REPEATER IN UNSPECIFIED TYPE COMMUNICATIONS LINE OR CHANNEL (E.G., RELAY STATION) {1}
407.1	DF	TACTUAL INDICATION {1}
815.4	DF	VISUAL INDICATION {18}
384.1	DF	AUDIBLE INDICATION {11}
999	DF	MISCELLANEOUS
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		FOREIGN ART COLLECTIONS
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*	DF	CONDITION RESPONSIVE INDICATING SYSTEM (340/500) {1}
*	DF	CONDITION RESPONSIVE INDICATING SYSTEM (340/500) {1}
*	DF	CONDITION RESPONSIVE INDICATING SYSTEM (340/500) {1}
*	DF	CONDITION RESPONSIVE INDICATING SYSTEM (340/500) {1}
*	DF	CONDITION RESPONSIVE INDICATING SYSTEM (340/500) {1}
*	DF	CONDITION RESPONSIVE INDICATING SYSTEM (340/500) {2}