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US Patent: 279,534
Adjusting Mechanism for Calipers
Patentee:
John J. Byrne (exact or similar names) - Chicago, IL

USPTO Classifications:
33/558.06

Tool Categories:
layout tools : calipers

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
James H. Coyne
Charles H. Schoff
Patent Dates:
Applied: Feb. 12, 1883
Granted: Jun. 19, 1883

Patent Pictures:
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