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US Patent: 66,695
Plumb Level
Patentees: Christian Ensminger (exact or similar names) - Springfield, MA Alpheus W. Elmer (exact or similar names) - Springfield, MA USPTO Classifications: 33/451 Tool Categories: layout tools : levels : inclinometers layout tools : protractors Assignees: None Manufacturer: Not known to have been produced Witnesses: Joseph Miller John M. Stebbins	Patent Dates: Granted: Jul. 16, 1867 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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