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Primary view of Pump.
Carmichael, Robert E.
February 1, 1919
Primary view of Sulphur-Mining Apparatus.
Carmichael, Robert E.
December 17, 1918
Primary view of Method of and Apparatus for Sulphur Mining
Carmichael, Robert E.
unknown creation date
Primary view of Pipe-Wrench.
Carmichael, Robert E.
December 9, 1919
Primary view of Hoisting Drum
Suman, John R. & Gamble, Adrian R.
May 2, 1922
Primary view of Combination Well-Packer and Setting-Tool.
Abercrombie, Jamie & Dunman, Nesbit M.
January 6, 1920
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