US PATENT SUBCLASS 40 / 477
.~ Fluid operated
Current as of:
June, 1999
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40 /
HD
CARD, PICTURE, OR SIGN EXHIBITING
446
DF
CHANGING EXHIBITOR
{25}
477
.~ Fluid operated {2}
478
DF
.~.~
> Double reel and web
479
DF
.~.~
> Rotatable {1}
DEFINITION
Classification: 40/477
Fluid operated:
(under subclass 446) Exhibitor in which the device is operated by pressure of a fluid such as air, gas, steam or water.
SEE OR SEARCH THIS CLASS, SUBCLASS:
406+, for display devices in which fluid is moved or diffused as in drinking, smoking, or bubble making devices.