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US Patent: 1,341,546
Micrometer
Patentee:
John Jones Davis (exact or similar names) - Youngstown, OH

USPTO Classifications:
33/679.1

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

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
none listed
Patent Dates:
Applied: Sep. 23, 1919
Granted: May 25, 1920

Patent Pictures:
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