US PATENT SUBCLASS 137 / 78.5
.~ Atmospheric
Current as of:
June, 1999
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137 /
HD
FLUID HANDLING
78.1
DF
AMBIENT CONDITION CHANGE RESPONSIVE
{4}
78.5
.~ Atmospheric {2}
79
DF
.~.~
> Temperature {1}
81.1
DF
.~.~
> Pressure
DEFINITION
Classification: 137/78.5
Atmospheric:
(under subclass 78.1) Apparatus in which control of a flow of fluid is responsive to a variation in a condition of, or in surrounding atmosphere.