US PATENT SUBCLASS 417 / 99
.~.~ Mercury piston

Current as of: June, 1999
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417 /   HD   PUMPS

65  DF  ONE FLUID PUMPED BY CONTACT OR ENTRAINMENT WITH ANOTHER {10}
92  DF  .~ Liquid piston {6}
99.~.~ Mercury piston

DEFINITION

Classification: 417/99

(under subclass 92) Apparatus in which the liquid body comprises the element mercury.