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Engineer's Safety-Throttle for Locomotive Dry Pipes
Patent for improved safety mechanism for the dry pipe of a steam-powered locomotive engine.
Date:
November 16, 1920
Creator:
Hartman, John Wesley
System:
The Portal to Texas History
Pipe-Wrench.
Patent for improvements to pipe wrenches to a more simple design.
Date:
February 16, 1915
Creator:
Lewis, Guy V.
System:
The Portal to Texas History