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US Patent: 1,404,393
Combined Level and Grade Finder
Patentee:
Theodore Henri (exact or similar names) - New York, NY

USPTO Classifications:
33/402

Tool Categories:
layout tools : levels : inclinometers

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Applied: Jul. 17, 1920
Granted: Jan. 24, 1922

Patent Pictures:
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Report data errors or omissions to steward Ralph Brendler
Description:
This is a simple inclinometer meant to be fitted into a normal mason's level.

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