Drilldown: Patents

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Patents > Inventor country: US & Filing date: 1800 - 1899 & National tech categories : USPC 244/153R or USPC 244/3.23

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Inventors:
Lincoln A. Merriam (2) · Frank M. Ashley (2) · Halvor Halvorson (2) · William Franklin Fleharty (2) · Claison S. Wardwell (2)
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None (10) · Charles Spear (2) · William Franklin Fleharty (2) · Claison S. Wardwell (2) · Frank M. Ashley (2)
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