US PATENT SUBCLASS 246 / 294
.~.~.~ Visual and audible

Current as of: June, 1999
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246 /   HD   RAILWAY SWITCHES AND SIGNALS

270 R  DF  VEHICLE-ENERGY ACTUATION {11}
292  DF  .~ Signals and gates, automatic {2}
293  DF  .~.~ Highway crossing {2}
294.~.~.~ Visual and audible

DEFINITION

Classification: 246/294

(under subclass 293) Subject matter including combined visual and audible signals.

(1) Note. In some cases the audible signals of this subclass are electrically-actuated bells controlled by the movement of the visual signal.