US PATENT SUBCLASS 340 / 903-- .~.~ Relative distence between vehicles (e.g., collision alert)

US PATENT SUBCLASS 340 / 903
.~.~ Relative distence between vehicles (e.g., collision alert)

Current as of: June, 1999
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340 /	HD	COMMUNICATIONS: ELECTRICAL

901	DF	EXTERNAL CONDITION VEHICLE-MOUNTED INDICATOR OR ALARM {3}
902	DF	.~ Transmitter in another vehicle (e.g., emergency vehicle) {1}
903		.~.~ Relative distence between vehicles (e.g., collision alert)

DEFINITION

Classification: 340/903

Relative distance between vehicles (e.g., collision alert):

(under subclass 902) Subject matter wherein the alarm indicates the separation between vehicles.

(1) Note. Potential collision alerting systems are included here when the vehicles are not aircraft.

SEE OR SEARCH THIS CLASS, SUBCLASS:

961, for potential collision alerting systems when used on aircraft.

SEE OR SEARCH CLASS

342, Communications: Directive Radio Wave Systems and Devices (e.g., Radar, Radio Navigation),

29+, 41, and 455 for collision avoidance apparatus using radio wave communications.