US PATENT SUBCLASS 405 / 84
.~.~ Navigable canal

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}
84.~.~ Navigable canal {1}
85  DF  .~.~.~> Having lock {1}

DEFINITION

Classification: 405/84

Navigable canal:

(under subclass 80) Method or apparatus relating to navigable waterways or miscellaneous appliances not otherwise classifiable for use therein.

SEE OR SEARCH THIS CLASS, SUBCLASS:

268, for the mere lining of a canal bed with a cementitous material.