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US Patent: 1,180,448
Power-grinder
Patentee: Carl E. Shields (exact or similar names) - Rock Island, IL USPTO Classifications: 451/341 Tool Categories: metalworking machines : grinders : grindstone frames propulsion and energy : human powered apparatus Assignees: None Manufacturer: Rock Island Manufacturing Co. - Rock Island, IL Witnesses: F. W. Thieson L. C. Downing	Patent Dates: Applied: Feb. 05, 1915 Granted: Apr. 25, 1916 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Rock Island Mfg. Co.

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