Drilldown: Patents

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Patents > Office : NO or Other & Filing date: 1800 - 1899 & Family year: 1870 - 1879 & Number of claims: 2-3

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None (8) · DE 77 (2) · USPC 244/73R (2) · USPC 244/3.23 (2) · USPC 244/28 (2)
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