US PATENT SUBCLASS 446 / 210
.~ Convection-operated

Current as of: June, 1999
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446 /   HD   AMUSEMENT DEVICES: TOYS

176  DF  OPERATED BY RELATIVELY MOVING FLUID OR PRESSURE DIFFERENTIAL {9}
210.~ Convection-operated

DEFINITION

Classification: 446/210

Convection-operated:

(under subclass 176) Device including means actuated by a vertically moving air current resulting from a nonuniform temperature distribution in the air.

SEE OR SEARCH CLASS

40, Card, Picture, or Sign Exhibiting,

441, for convention operated rotating display devices.