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US Patent: 53,795
Improvement in Plumb-Levels
Patentee: Michael W.E. Doran (exact or similar names) - Indianapolis, IN USPTO Classifications: 33/344, 33/391 Tool Categories: layout tools : levels : pendulum levels Assignees: None Manufacturer: Not known to have been produced Witnesses: John H. Redstone W. Sullivan	Patent Dates: Granted: Apr. 10, 1866 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Ralph Brendler
Description: This is a simple pendulum level or inclinometer that uses a series of loosely-connected weights to dampen the vibration of the pendulum.

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