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US Patent: 471,428
Combined Section Liner and Protractor
Patentee: Lewis Miller (exact or similar names) - Oil City, Venango County, PA USPTO Classifications: 33/450 Tool Categories: layout tools : protractors trade specific : draftsman Assignees: Lewis Miller - Oil City, Venango County, PA Frank H. Taylor - Oil City, Venango County, PA George H. Torrey - Oil City, Venango County, PA Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Nov. 11, 1891 Granted: Mar. 22, 1892 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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