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.