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US Patent: 552,238
Screw Thread Gage
Patentee: Samuel Darling (exact or similar names) - Providence, RI USPTO Classifications: 33/199R Tool Categories: metalworking tools : machinist tools : measuring tools : thread gages Assignees: None Manufacturer: Not known to have been produced Witnesses: Harry J. Garcean Henry E. Reynolds	Patent Dates: Applied: Sep. 05, 1895 Granted: Dec. 31, 1895 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Russ Allen.

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