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US Patent: 630,536
Drill-grinding machine
Patentees: James N. Heald (exact or similar names) - Barre, MA Leander S. Heald (exact or similar names) - Barre, MA USPTO Classifications: 33/628, 451/276, 451/375 Tool Categories: metalworking machines : grinders : drill grinders metalworking machines : grinders : sharpening machines : drill sharpening machines tool making : making drills and augers Assignees: None Manufacturer: L. S. Heald & Son - Barre, MA Witnesses: John C. Bartholomew James W. Carruth	Patent Dates: Granted: Aug. 08, 1899 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for L. S. Heald & Son

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