US PATENT SUBCLASS 137 / 81.2
.~ Underwater
Current as of:
June, 1999
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137 /
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FLUID HANDLING
78.1
DF
AMBIENT CONDITION CHANGE RESPONSIVE
{4}
81.2
.~ Underwater
DEFINITION
Classification: 137/81.2
Underwater:
(under subclass 78.1) Apparatus in which control of a flow of fluid is responsive to a variation in a condition of, or in an environment beneath the surface of a body of water.