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US Patent: 684,236
Center Grinding Attachment for Lathes
Patentee: James N. Heald (exact or similar names) - Barre, Worcester County, MA USPTO Classifications: 451/436 Tool Categories: metalworking machines : metal lathes : metal lathe accessories and attachments Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Jan. 28, 1901 Granted: Oct. 08, 1901 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for S. Heald & Sons

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