US PATENT SUBCLASS 417 / 216
.~ Plural pumps with individual or relative control

Current as of: June, 1999
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417 /   HD   PUMPS

212  DF  CONDITION RESPONSIVE CONTROL OF DRIVE TRANSMISSION OR PUMP DISPLACEMENT {7}
216.~ Plural pumps with individual or relative control

DEFINITION

Classification: 417/216

(under subclass 212) Apparatus comprising a plurality of pumping units wherein the control means effects a change in the operating characteristics of one unit relative to another.