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US Patent: 206,410
Ruler
Patentee: Henry Adler (exact or similar names) - Pittsburg, Allegheny County, PA USPTO Classifications: 30/123, 30/357, 33/485 Tool Categories: rules Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Jan. 22, 1878 Granted: Jul. 30, 1878 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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