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US Patent: 431,809
Attachment for Metal Screw Machines
Patentee: James Hartness (exact or similar names) - Springfield, Windsor County, VT USPTO Classifications: 29/46, 29/65, 74/816, 74/817 Tool Categories: metalworking machines : metal lathes : metal lathe accessories and attachments metalworking machines : screw machines Assignees: Jones & Lamson Machine Co. - Springfield, Windsor County, VT Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Apr. 03, 1890 Granted: Jul. 08, 1890 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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