US PATENT SUBCLASS 37 / 236
.~.~ Power means is hydraulically actuated piston

Current as of: June, 1999
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37 /   HD   EXCAVATING

196  DF  SNOW OR ICE REMOVING OR GROOMING BY PORTABLE DEVICE {16}
235  DF  .~ Vehicle mount including power lift {1}
236.~.~ Power means is hydraulically actuated piston

DEFINITION

Classification: 37/236

Power means is hydraulically actuated piston:

(under subclass 235) Apparatus in which the power system includes a piston axially movable within a cylinder by liquid pressure.