US PATENT SUBCLASS 246 / 127
.~.~ Gates and doors
Current as of:
June, 1999
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246 /
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RAILWAY SWITCHES AND SIGNALS
125
DF
ELECTRIC AUTOMATIC HIGHWAY SIGNALS, MINE DOORS, AND GATES
{3}
126
DF
.~ Car-actuated controller {1}
127
.~.~ Gates and doors
DEFINITION
Classification: 246/127
(under subclass 126) Subject matter where the actuated devices are either crossing-gates, mine-doors, or curtains.
SEE OR SEARCH THIS CLASS, SUBCLASS:
111, 125, 260, 293, and 473, and appropriate indented subclasses for signal structure.