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US Patent: 1,617,443
Micrometer
Patentees:
Ernest A. Erickson (exact or similar names) - Wilson, PA
Zearl E. Neal (exact or similar names) - West Elizabeth, PA

USPTO Classifications:
33/709

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

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
J. Herbert Bradley

Patent Dates:
Applied: Jan. 30, 1925
Granted: Feb. 15, 1927

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