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Primary view of Valve-Grinder.
Ralston, John
July 13, 1920
Primary view of Well-Packer.
Fletcher, Harold W.
April 13, 1920
Primary view of Pump Piston
Humason, Granville A.
January 13, 1920
Primary view of Pump.
Carden, David A.
April 13, 1920
Primary view of Pneumatic Tire.
Church, Shelby L.
July 13, 1920
Primary view of Piston.
Miller, William James
January 13, 1920
Primary view of Display and Vending Device.
Ogden, Carlton N.
January 13, 1920
Primary view of Testing Device.
Harpst, Frederick E.
April 13, 1920
Primary view of Gin
Tischer, Edward R.
January 13, 1920
Primary view of Rotary Boring-Drill
Hughes, Howard R.
January 13, 1920
Primary view of Power-Transmitting Mechanism.
Smith, Robert W. J.
July 13, 1920
Primary view of Apparatus for Extracting Minerals from Ores.
Shires, George M.
January 13, 1920
Primary view of Apparatus for Treatment of Oil Emulsions.
McKibben, Charles W.
January 13, 1920
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