US PATENT SUBCLASS 246 / 116
.~.~ Fluid pressure

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

111  DF  GRADE-CROSSING TRACK PROTECTION {3}
113  DF  .~ Automatic {2}
116.~.~ Fluid pressure

DEFINITION

Classification: 246/116

(under subclass 113) Subject matter having fluid-pressure means for the actuation or control of the signals.

SEE OR SEARCH THIS CLASS, SUBCLASS:

93, 100, 101, 139, 142, 257, 271, 272, and 361, for systems using fluid-pressure means.

111, 125, 260, 293, and 473, and appropriate indented

subclasses, for signal structure.