US PATENT SUBCLASS 340 / 929
.~ Indication of time remaining before change of phase

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

907  DF  TRAFFIC CONTROL INDICATOR {8}
929.~ Indication of time remaining before change of phase {1}
930  DF  .~.~> Electromechanical movable auxiliary indicator

DEFINITION

Classification: 340/929

Indication of time remaining before change of phase:

(under subclass 907) Subject matter having a means auxiliary to the traffic control indicator indicating when the upcoming change in the state of the traffic control indicator will occur.