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Valve Structure
Patent for valve improvements in controlling the flow of fluids under high pressure.
Date:
August 30, 1921
Creator:
Anderson, Jalmer
System:
The Portal to Texas History
Railroad-Tie.
Patent for a "simple and effective railroad tie for supporting the rails and rigidly holding them in the position of use" (lines 19-21).
Date:
January 30, 1894
Creator:
Lee, John Chester
System:
The Portal to Texas History
Cut-off Valve for Pipe-Lines
Patent for cut-off valve for pipe-lines intended for oil companies.
Date:
April 30, 1918
Creator:
Hagern, Joseph F.
System:
The Portal to Texas History