US PATENT SUBCLASS 166 / 241.3
.~.~ Rotatable or having a rotatable element

Current as of: June, 1999
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166 /   HD   WELLS

241.1  DF  GUIDE FOR DEVICE OR CONDUIT {3}
241.2  DF  .~ On sucker or pump rod {2}
241.3.~.~ Rotatable or having a rotatable element

DEFINITION

Classification: 166/241.3

Rotatable or having a rotatable element:

(under subclass 241.2) Apparatus where the centralizer includes an element that turns about an axis.