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US Patent: 38,252
Improvement in Combined Plumb and Levels
Patentee:
Frederick A. Traut (exact or similar names) - New Britain, CT

USPTO Classifications:
33/388

Tool Categories:
layout tools : levels : inclinometers

Assignees:
None

Manufacturer:
The Stanley Rule & Level Co. - New Britain, CT

Witnesses:
A. B. Gillet
Jeremy W. Bliss

Patent Dates:
Granted: Apr. 21, 1863

Patent Pictures: [ 1 | 2 ]
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Description:
This design by prolific Stanley patent man Frederick Traut (father of even more prolific patent name Justus Traut) features an unusual "drop-in" level/inclinometer mechanism that allows the bubble to be accurately set at any angle between 0 and 90 degrees.

Levels featuring this design were produced by the Stanley Rule and Level company as their #32.

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