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US Patent: 561,802
Micrometer Calipers
Patentee:
Samuel H. Markham (exact or similar names) - Pittsburgh, PA

USPTO Classifications:
33/813

Tool Categories:
metalworking tools : machinist tools : measuring tools : micrometers

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Paul Jobol
C. R. Fraguere
James Brown
A. C. Frank
Patent Dates:
Applied: May 08, 1895
Granted: Jun. 09, 1896

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