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US Patent: 1,561,630
Micrometer Calipers
Patentee:
Robert A. Wilson - Waltham, 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: Nov. 24, 1924
Granted: Nov. 17, 1925

Patent Pictures:
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