Wellhead fitting
United States Patent 2243598

Inventors:
Flemming, Homer V.
Barney, William R.
Publication Date:
05/27/1941
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Assignee:
W C NORRIS MANUFACTURER INC
Primary Class:
285/235
Other Classes:
277/504, 277/520, 277/329
International Classes:
E21B33/04; E21B33/03