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US Patent: 339,410
Adjustable interior-calipers
Patentee:
Adolph Heydrich (exact or similar names) - Topeka, KS

USPTO Classifications:
33/544, 33/827

Tool Categories:

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Harry Derickson
Joseph Gerdom
Patent Dates:
Applied: Aug. 06, 1885
Granted: Apr. 06, 1886

Patent Pictures:
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