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US Patent: 230,420
Combined Calipers & Scriber
Patentee:
Manuel W. Kahle - Duke Centre, PA

USPTO Classifications:
112/75, 33/674

Tool Categories:
layout tools : calipers
layout tools : scribes

Assignees:
Martha Jane Kahle - Duke Centre, PA

Manufacturer:
Not known to have been produced

Witnesses:
Michael J. Stark
Frank Hirsch

Patent Dates:
Applied: May 17, 1880
Granted: Jul. 27, 1880

Patent Pictures:
USPTO pdf tiff
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