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Primary view of Valve Structure for Oil-Wells.
McEvoy, John Philip
September 19, 1919
Primary view of Well Pumping Apparatus
Stephenson, William M.
September 29, 1908
Primary view of Mechanical Toy Hoop
Giesecke, Leo
September 5, 1916
Primary view of Hydraulic Swivel
Thomson, Alexander & McLaughlin, Malacha Joseph
September 26, 1905
Primary view of Stand-Value for Oil-Well Pumps.
Slaughter, George W., Jr.
September 24, 1918
Primary view of Nut-Lock
Lance, Andrew M.
September 6, 1910
Primary view of Plunger.
Karnes, Harry E.
September 14, 1909
Primary view of Engine Valve Mechanism
Moore, Ezra G. & Moore, Frank T.
September 5, 1905
Primary view of Screw-Gearing
Paker, Oren A.
September 18, 1900
Primary view of Spring-Wheel
Hudson, Alexander S.
September 24, 1912
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