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US Patent: 1,488,916
Combination Tool
Folding Square and Protractor
Patentee:
Anthony George - Grenora, ND

USPTO Classifications:
33/275R, 33/426, 33/458, 33/459

Tool Categories:
combination tools
layout tools : levels
layout tools : squares
layout tools : protractors

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Jan. 03, 1922
Granted: Apr. 01, 1924

Patent Pictures:
USPTO pdf tiff
Google Patents
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Description:
This tool combines a sighting level with a square and protractor, all in a single fold-up tool. That fact that the patent was granted on April Fool's Day should tell you something.

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