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US Patent: 396,064
Inside Calipers or Gage
Patentee:
John A. Blair (exact or similar names) - Philadelphia, PA

USPTO Classifications:
33/542, 33/557

Tool Categories:
layout tools : measurement gauges

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
John A. Wiedersheim
Robert Aiton
Patent Dates:
Applied: Aug. 04, 1888
Granted: Jan. 15, 1889

Patent Pictures:
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