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US Patent: 1,768,931
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Patentee:
Frederick Jackson Pratt (exact or similar names) - Ferndale, MI

USPTO Classifications:
33/502, 451/8

Tool Categories:
layout tools : measurement gauges

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
none listed
Patent Dates:
Applied: Jun. 03, 1929
Granted: Jul. 01, 1930

Patent Pictures:
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Report data errors or omissions to steward Joel Havens
Description:
S. E. Thomas - patent attorney

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