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1890 - Adolph Pettenkofer (?), Sewing machine Patent model
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Patent # 426,737; Issued April 29, 1890 - Adolph Pettenkofer (?), Patent model for a reversible feed mechanism for sewing machines.
National Museum of American History’s own descriptionCredit line1890 - Adolph Pettenkofer (?), Sewing machine Patent model. National Museum of American History. CC0.