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.