US PATENT SUBCLASS 251 / 282
.~ Reciprocating
Current as of:
June, 1999
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251 /
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VALVES AND VALVE ACTUATION
281
DF
BALANCED VALVES
{2}
282
.~ Reciprocating
DEFINITION
Classification: 251/282
(under subclass 281) Valves wherein the valve has a linear motion to and from flow obstructing position.