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US Patent: 2,963,833
Expansible wheel and hub structure
Patentees: Sam A. Mercurio (exact or similar names) - Chicago, IL John R. MacIntosh (exact or similar names) - Chicago, IL USPTO Classifications: 451/506, 492/47 Tool Categories: industrial tools : grinding wheels woodworking machines : sanding machines : belt sanders metalworking machines : grinders : sharpening machines : grinding wheels Assignees: Mermac Products, Inc. - Chicago, IL Manufacturer: Mermac Products, Inc. - Chicago, IL Witnesses: Unknown	Patent Dates: Applied: Aug. 06, 1957 Granted: Dec. 13, 1960 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin

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