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US Patent: 596,750
Screw Cutting Attachment
Patentee: James Hartness (exact or similar names) - Springfield, Windsor County, VT USPTO Classifications: 29/57, 470/10, 470/71 Tool Categories: metalworking machines : metal lathes : turret lathes metalworking tools : tap and die holders Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: May 18, 1897 Granted: Jan. 04, 1898 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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