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Title:
Fluid-operated swab
United States Patent 1784096
Inventors:
Fletcher, Harold W.
Application Number:
US38034929A
Publication Date:
12/09/1930
Filing Date:
07/23/1929
Assignee:
HUGHES TOOL CO
Primary Class:
Other Classes:
166/155
International Classes:
E21B23/10; E21B37/10
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