US PATENT SUBCLASS 340 / 471
.~.~ Hazard warning or distress signalling

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

425.5  DF  LAND VEHICLE ALARMS OR INDICATORS {11}
468  DF  .~ External signal light system {6}
471.~.~ Hazard warning or distress signalling {2}
472  DF  .~.~.~> Auxiliary signal permanently attached to vehicle
473  DF  .~.~.~> Portable signal

DEFINITION

Classification: 340/471

Hazard warning or distress signalling:

(under subclass 468) Subject matter including systems designed to indicate to other drives that the signalling vehicle is inoperative, or is being operated in an unusual manner and itself constitutes a hazard to other vehicles.