US PATENT SUBCLASS 73 / 324
.~.~ With cleaner

Current as of: June, 1999
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73 /   HD   MEASURING AND TESTING

290 R  DF  LIQUID LEVEL OR DEPTH GAUGE {13}
323  DF  .~ Sight glass {5}
324.~.~ With cleaner

DEFINITION

Classification: 73/324

(under subclass 323) Glasses having a cleaning apparatus or implement incorporated therewith for cleaning the sight glass, sight tube or its connecting passages.

SEE OR SEARCH CLASS

15, Brushing, Scrubbing, and General Cleaning,

104.03+, for tube cleaning implements, per se.