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US Patent: 1,829,797
Thread Gauging
Patentee: James Hartness (exact or similar names) - Springfield, Windsor County, VT USPTO Classifications: 33/199R, 411/259, 411/929, 411/941 Tool Categories: metalworking tools : machinist tools : measuring tools : thread gages Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: May 18, 1927 Granted: Nov. 03, 1931 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Jones, Lamson & Co.

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