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US Patent: 1,409,342
Combined Protractor and Scale
Patentee:
Herman Henrichs (exact or similar names) - St. Louis, MO

USPTO Classifications:
33/472

Tool Categories:
layout tools : protractors

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Applied: Jul. 22, 1919
Granted: Mar. 14, 1922

Patent Pictures:
USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Ralph Brendler
Description:
This protractor features several measuring arms and additional scales.

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