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Start Over Resource Type Patent Counties Travis County, TX Year 1917 Month December

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Valve-Closure for Ventilators (open access)

Valve-Closure for Ventilators

Patent for a new valve-closure for ventilators on plumbing systems by W.L. Hamilton and G. McCullough.
Date: December 20, 1917
Creator: Hamilton, William L. & McCullough, George
System: The Portal to Texas History