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US Patent: 3,233,330
Micrometer for Inner Measurements
Patentee:
Chi Liang Cho (exact or similar names) - Zurich, Switzerland

USPTO Classifications:
33/544.6

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. 29, 1961
Granted: Feb. 08, 1966

Patent Pictures:
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