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US Patent: 1,947,234
Machine for truing brake drums
Patentee: Gustaf David Sundstrand (exact or similar names) - Rockford, IL USPTO Classifications: 451/146, 451/902, 82/132 Tool Categories: trade specific : vehicle repairer : vehicle mechanic : brake maintenance Assignees: Mattison Machine Works - Rockford, IL Manufacturer: Mattison Machine Works - Rockford, IL Witnesses: Unknown	Patent Dates: Applied: Dec. 21, 1928 Granted: Feb. 13, 1934 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Mattison Machine Works

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