US Patent: 53,795
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Improvement in Plumb-Levels
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Patentee:
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Michael W.E. Doran (exact or similar names) - Indianapolis, IN |
Manufacturer: |
Not known to have been produced |
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Patent Dates:
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Granted: |
Apr. 10, 1866 |
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Ralph Brendler
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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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