US PATENT SUBCLASS 246 / 307
.~.~.~.~ Vertical motion

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}
297  DF  .~.~ Track mechanism {7}
304  DF  .~.~.~ Vehicle-restrained gates and doors {3}
307.~.~.~.~ Vertical motion {1}
308  DF  .~.~.~.~.~> Swinging {1}

DEFINITION

Classification: 246/307

(under subclass 304) Subject matter including a restraining device which moves vertically.

SEE OR SEARCH THIS CLASS, SUBCLASS:

302, 313, 351+, and 368+, for vertically-moving track-trips.