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US Patent: 1,251,648
Calipers
Patentee:
Raymond J. Dunn - Hartford, CT

USPTO Classifications:
33/797

Tool Categories:
layout tools : measurement gauges

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
none listed

Patent Dates:
Applied: May 23, 1917
Granted: Jan. 01, 1918

Patent Pictures:
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