US PATENT SUBCLASS 49 / 93
.~ Closures on opposite approaches to crossing

Current as of: June, 1999
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49 /   HD   MOVABLE OR REMOVABLE CLOSURES

73.1  DF  CLOSURES INTERCONNECTED FOR CONCURRENT MOVEMENT {9}
93.~ Closures on opposite approaches to crossing

DEFINITION

Classification: 49/93

(under subclass 73) Device wherein there is a first passageway intersecting the path of travel of a second passageway, e.g., a motor road and railroad with the concurrently movable closures being positioned in the path of travel at opposed accesses to the first passageway.

SEE OR SEARCH THIS CLASS, SUBCLASS:

68, for successive closures along a passageway.

95, for interconnected closures on opposite barriers.