Title:
Well swab
Document Type and Number:
United States Patent 2277002
Inventors:
Macclatchie, John W.
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Publication Date:
03/17/1942
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Export Citation:
Assignee:
MACCLATCHIE MFG COMPANY OF CAL
Primary Class:
Other Classes:
166/188, 92/254, 166/241.100, 417/284, 277/493, 277/336, 417/555.200
International Classes:
E21B37/10; E21B37/00