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Primary view of Tunneling-Machine
Hughes, Howard Robard
unknown creation date
Primary view of Load-Indicator
Fletcher, Harold W.
unknown creation date
Primary view of Trap.
Dinkins, Earl T.
June 27, 1922
Primary view of Tread for Pneumatic Tires.
Twombly, Royal W.
September 30, 1919
Primary view of Pump.
Humason, Granville Allison
July 6, 1920
Primary view of Method of Sampling.
Carmichael, Robert E.
July 20, 1920
Primary view of Sulfur-Mining
Carmichael, Robert E.
December 17, 1918
Primary view of Sulphur-Mining Apparatus.
Carmichael, Robert E.
December 17, 1918
Primary view of Heater.
Briscoe, Williard H.
November 18, 1919
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 Pipe-Cutter
Carmichael, Robert E.
unknown creation date
Primary view of Hoisting Drum
Suman, John R. & Gamble, Adrian R.
May 2, 1922
Primary view of Horizontal-Drilling Machine
Hughes, Howard R.
November 26, 1918
Primary view of Gin Attachment
Hooton, Claude A.
September 26, 1922
Primary view of Sample-Taking Device
Carmichael, Robert E. & Hamman, George
December 9, 1919
Primary view of Rotary Boring-Drill.
Hughes, Howard R.
January 28, 1919
Primary view of Sample Taking Device.
Rembert, William E.
September 19, 1919
Primary view of Rotary Boring Drill
Hughes, Howard R
November 6, 1917
Primary view of Concrete Building-Block.
McEwen, James R.
December 27, 1921
Primary view of Constant-Volume Valve.
Dewey, Maurice J.
February 28, 1922
Primary view of Valve for Pumps.
Shevlin, Miles
June 7, 1921
Primary view of Roller Boring-Drill.
Fletcher, Harold W.
August 23, 1921
Primary view of Pump-Plunger
Miller, Frank J.
October 18, 1921
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