US PATENT SUBCLASS 405 / 124
.~.~ Culvert

Current as of: June, 1999
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405 /   HD   HYDRAULIC AND EARTH ENGINEERING

52  DF  FLUID CONTROL, TREATMENT, OR CONTAINMENT {7}
80  DF  .~ Flow control {7}
124.~.~ Culvert {2}
125  DF  .~.~.~> Terminal or head
126  DF  .~.~.~> Serially connected segments

DEFINITION

Classification: 405/124

Culvert:

(under subclass 80) Method or apparatus relating to conducting water not under pressure within a closed fluid conduit through an embankment.

SEE OR SEARCH THIS CLASS, SUBCLASS:

184, for a method or apparatus for advancing a length of conduit through an embankment.

SEE OR SEARCH CLASS

138, Pipes and Tubular Conduits, appropriate subclass for pipe structure, per se.