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US Patent: 2,311,477
Inside Micrometer
Patentee:
William A. Semerak (exact or similar names) - Chicago, IL

USPTO Classifications:
33/794

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

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
none listed
Patent Dates:
Applied: Mar. 10, 1942
Granted: Feb. 16, 1943

Patent Pictures:
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