Patrick Coad family papers, 1798-1888 MC 37
Patrick Coad (1783-1872), an Irish immigrant who settled in Philadelphia, was the first patentee of a graduated galvanic battery with insulated poles. Touting his battery among other uses as an instrument that helped cure various diseases, Coad’s invention attracted a good deal of attention within t...
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Philadelphia Archdiocesan Historical Research Center
1798-1888
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