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US Patent: 972,330
Square
Patentee:
Charles H. Caldwell (exact or similar names) - Portland, OR

USPTO Classifications:
403/95

Tool Categories:
layout tools : squares : carpenter squares

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
W. N. Woodson
Frederick S. Stitt

Patent Dates:
Applied: Mar. 15, 1910
Granted: Oct. 11, 1910

Patent Pictures:
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