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Patents for Horatio Gates Spafford
Patents 1 - 3 of 3
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NumberDatePatenteeTitleType
3,603XOct. 30, 1822H.G. SpaffordArt of making cast and wrought steelsteel maker
3,604XOct. 30, 1822H.G. SpaffordMaking iron and steelsteel maker
3,625XDec. 19, 1822H.G. SpaffordArt of making edge toolstool maker
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