US PATENT SUBCLASS 15 / 343
.~.~.~.~ Hand cranked

Current as of: June, 1999
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15 /   HD   BRUSHING, SCRUBBING, AND GENERAL CLEANING

3  DF  MACHINES {11}
300.1  DF  .~ With air blast or suction {26}
341  DF  .~.~ Traction or manual operation of air pump or fan {1}
342  DF  .~.~.~ Rotary air impeller {1}
343.~.~.~.~ Hand cranked

DEFINITION

Classification: 15/343

(under subclass 342) Devices in which the air impeller is rotated by hand-operated cranks or the like.