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US Patent: 1,365,991
Combined Fixed-Angle Square and Protractor
Patentee:
Alfred H. Helden (exact or similar names) - Kansas City, MO

USPTO Classifications:
33/426

Tool Categories:
layout tools : bevels
layout tools : squares

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Feb. 28, 1919
Granted: Jan. 18, 1921

Patent Pictures:
USPTO (New site tip)
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Report data errors or omissions to steward Ralph Brendler
Description:
This bevel square provides two indicator points, allowing both the angle and its converse to be read at once.

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