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Patents for Phineas C. Dummer
Patents 1 - 2 of 2
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4,901XOct. 16, 1827P.C. DummerMode of pressing glass with a coreglassmaker
4,902XOct. 16, 1827G. Dummer, P.C. DummerGlass formed by a combination of mouldsglassmaker
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