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US Patent: 1,894,107
Adjustable Protractor
Patentee:
Willibald Lück - New York, NY

USPTO Classifications:
33/426

Tool Categories:
layout tools : protractors

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Dec. 27, 1930
Granted: Jan. 10, 1933

Patent Pictures:
USPTO pdf tiff
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Description:
This is a simple ruler with a 90-degree square mounted on it. The square can be pivoted to mark any angle.

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