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US Patent: 2,489,811
Belt polishing and grinding machine
Patentee: Henry C. Perkins (exact or similar names) - Kalamazoo, MI USPTO Classifications: 244/103S, 451/308, 451/310, 451/311, 451/363 Tool Categories: woodworking machines : sanding machines Assignees: Hammond Machinery Builders, Inc. - Kalamazoo, MI Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Mar. 31, 1948 Granted: Nov. 29, 1949 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Hammond Machine Co.

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