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US Patent: 431,184
Plumb-Level
Patentee: Reuben Einstein (exact or similar names) - Meadville, PA USPTO Classifications: 33/399 Tool Categories: layout tools : levels : inclinometers Assignees: None Manufacturer: Not known to have been produced Witnesses: Edwin Percy Brown A. K. Carmichael Geo. G. Thorpe G. A. Fauberschmidt	Patent Dates: Applied: Apr. 05, 1890 Granted: Jul. 01, 1890 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Ralph Brendler
Description: This inclinometer features several elements designed to make it more rugged and less susceptible to going out of alignment when dropped.

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