US PATENT SUBCLASS 405 / 82
.~.~.~ Elevator

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}
81  DF  .~.~ Fishway {2}
82.~.~.~ Elevator

DEFINITION

Classification: 405/82

Elevator:

(under subclass 81) Method or apparatus wherein the fish are mechanically raised or lowered to carry them around the obstruction.