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US Patent: 1,674,973
Grinding Machine
Patentees: Arthur L. Kline (exact or similar names) - Detroit, Wayne County, MI Charles F. Clark (exact or similar names) - Detroit, Wayne County, MI USPTO Classifications: 451/143, 451/400 Tool Categories: metalworking machines : grinders : internal grinders Assignees: Pratt & Whitney Co. - New York, NY Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: May 26, 1925 Granted: Jun. 26, 1928 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Pratt, Whitney & Co.

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