Specification of a patent for a machine,denominated the “facilitator,” for the napping of hats. Granted to A. P. Gregory,Ithaca, Tompkins county,New York,May 13th, 1830期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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Specification of a patent for a machine,denominated the “facilitator,” for the napping of hats. Granted to A. P. Gregory,Ithaca, Tompkins county,New York,May 13th, 1830

Authors:	AP Gregory

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