US PATENT SUBCLASS 40 / 439
.~ Fluid operated
Current as of:
June, 1999
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40 /
HD
CARD, PICTURE, OR SIGN EXHIBITING
427
DF
DISPLAY WITH SPECIAL EFFECTS
{5}
439
.~ Fluid operated {1}
440
DF
.~.~
> Rotatable {1}
DEFINITION
Classification: 40/439
Fluid operated:
(under subclass 427) Display device wherein the effect is created by an apparatus operated by pressure of a fluid such as air, gas, steam, or water.
SEE OR SEARCH THIS CLASS, SUBCLASS:
477+, for changing exhibitors operated in a similar manner.
613, for signs which vibrate as a result of fluid or wind pressure.