US PATENT SUBCLASS 40 / 459
.~ Door operated

Current as of: June, 1999
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40 /   HD   CARD, PICTURE, OR SIGN EXHIBITING

446  DF  CHANGING EXHIBITOR {25}
459.~ Door operated

DEFINITION

Classification: 40/459

Door operated:

(under subclass 446) Device wherein the movement of a closure such as a gate or a door causes movement of the display device.