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US Patent: 1,231,920
Tool Holder for Grinding Machines
Patentee: Thomas Lumsden (exact or similar names) - Gateshead, Durham County, England USPTO Classifications: 451/239, 451/281, 451/394 Tool Categories: metalworking machines : grinders : sharpening machines : sharpening tool holders Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Jun. 07, 1916 Granted: Jul. 03, 1917 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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