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US Patent: 2,692,460
Grinding apparatus for the traveling belt type
Patentee: William D. Roberts (exact or similar names) - Pittsburgh, PA USPTO Classifications: 451/303, 451/311 Tool Categories: metalworking machines : metal sanding machines Assignees: Ryman Engineering Co. - Ellwood City, PA Manufacturer: Ryman Engineering Co. - Ellwood City, PA Witnesses: Unknown	Patent Dates: Applied: Apr. 26, 1952 Granted: Oct. 26, 1954 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Ryman Engineeering Co.

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