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Means for Preventing Clogging of the Working Barrels of Pumps.
Patent for an apparatus that prevents the clogging of the working barrels of pumps.
Date:
November 13, 1917
Creator:
Carmichael, Robert E.
System:
The Portal to Texas History
Rotary Drilling Apparatus dated November 5, 1918
Patent for a rotary drilling apparatus that specifies in wells and mines.
Date:
November 5, 1918
Creator:
Robert E. Carmichael
System:
The Portal to Texas History