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US Patent: 2,661,541
Helically-Coiled Hole Gauge
Patentee:
John H. Dulligan - South Gate, CA

USPTO Classifications:
33/542, 33/831

Tool Categories:
layout tools : measurement gauges

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
none listed

Patent Dates:
Applied: Jul. 28, 1951
Granted: Dec. 08, 1953

Patent Pictures:
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Description:
C. G. Stratton - patent attorney

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