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US Patent: 1,388,740
Micrometer Caliper
Patentee:
Frank H. Miller (exact or similar names) - Milwaukee, WI

USPTO Classifications:
33/816

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

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Carmen B. Young
Patent Dates:
Applied: Oct. 15, 1920
Granted: Aug. 23, 1921

Patent Pictures:
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