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US Patent: 53,795
Improvement in Plumb-Levels
Patentee:
Michael W.E. Doran - 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:
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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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