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US Patent: 2,661,541
Helically-Coiled Hole Gauge
Patentee: John H. Dulligan (exact or similar names) - 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: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens
Description: C. G. Stratton - patent attorney

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