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US Patent: 139,821
Adjustable Try Square
Patentee:
Charles A. Schaefer (exact or similar names) - Chicago, IL

USPTO Classifications:
33/480

Tool Categories:
layout tools : squares : try squares

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
William Wolf
Henry Fleischhauer
Patent Dates:
Applied: Apr. 12, 1873
Granted: Jun. 10, 1873

Patent Pictures:
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