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US Patent: 1,631,019
Micrometer Calipers
Patentee:
Phillip J. Darlington (exact or similar names) - Brookline, MA

USPTO Classifications:
33/501.4

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. 24, 1926
Granted: May 31, 1927

Patent Pictures:
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