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US Patent: 1,373,367
Centering Square
Patentee:
Boyd Summers (exact or similar names) - Columbus, Franklin County, OH

USPTO Classifications:
33/673, 33/679, 33/833

Tool Categories:
layout tools : squares : center squares

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Applied: Jul. 19, 1920
Granted: Mar. 29, 1921

Patent Pictures:
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