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US Patent: 1,568,024
Magnetic Holding Device
Patentee: Henry K. Spencer (exact or similar names) - Watertown, Middlesex County, MA USPTO Classifications: 335/288, 335/289, 335/295 Tool Categories: metalworking machines : grinders : magnetic chucks Assignees: Blanchard Machine Co. - Cambridge, Middlesex County, MA Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Jan. 29, 1921 Granted: Dec. 29, 1925 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Blanchard Machine Co.

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