US PATENT SUBCLASS 166 / 173
.~ On tubing or casing

Current as of: June, 1999
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166 /   HD   WELLS

170  DF  BRUSHING, SCRAPING, CUTTING OR PUNCHING-TYPE CLEANERS {6}
173.~ On tubing or casing

DEFINITION

Classification: 166/173

(under subclass 170) Devices comprising cleaning elements projecting outwardly from and supported by a tubing or casing.

SEE OR SEARCH THIS CLASS, SUBCLASS:

172, for cleaning elements of the bow spring type supported on a tubing or casing.