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US Patent: 350,768
Inside Caliper
Patentee:
Walter Edwin Pettengill (exact or similar names) - Peterborough, NH

USPTO Classifications:
33/542, 403/48

Tool Categories:
layout tools : measurement gauges

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
R. H. Eddy
R. B. Torrey
Patent Dates:
Applied: Jun. 14, 1886
Granted: Oct. 12, 1886

Patent Pictures:
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Google Patents
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