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Primary view of Pumping Apparatus.
Cain, Francis Charles & Herrenkind, Oscar Charles
August 25, 1903
Primary view of Pump
Hunt, David
March 20, 1920
Primary view of Pump
Scott, Floyd L.
April 23, 1920
Primary view of Pump.
Humason, Granville Allison
July 6, 1920
Primary view of Pumping Jack
McCuin, William H.
January 2, 1917
Primary view of Plunger For Deep-Well Pumps
Coulson, William J.
April 20, 1920
Primary view of Valve Means for Oil Well Swivels
Lincoln, B. Hugh
February 27, 1917
Primary view of Rotary Core-Drill.
Smith, Thomas B.
May 1, 1917
Primary view of Pipe-Wrench.
Carmichael, Robert E.
December 9, 1919
Primary view of Pipe-Cutter
Wright, John F.
May 11, 1920
Primary view of Self-Cleaning Pump-Valve
Graf, Sydney H.
September 30, 1919
Primary view of Wire-Line Spooler
Robinson, Robert B.
March 28, 1919
Primary view of Hose-Clamp
Bennett, Clarence D.
May 21, 1918
Primary view of Device for Taking Samples from Wells.
Dodds, Redus D.
April 6, 1920
Primary view of Process of Increasing the Quality and Volume of Oil in Wells and Removing the Oil Therefrom.
Hallmark, Elmer C.
May 9, 1922
Primary view of Electrically-Controlled Puller For Oil-Well Casings.
Dooley, William D.
April 12, 1921
Primary view of Fishing Device for Oil Wells.
Sorensen, Sam
January 31, 1922
Primary view of Sample-Taking Device.
Christian, Walton G.
May 24, 1921
Primary view of Polished-Rod Clamp.
Weister, Edward P.
November 8, 1921
Primary view of Apparatus for Hoisting Liquids from Wells.
McCall, Duncan D.
October 28, 1913
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