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US Patent: 2,947,227
Twin Screw Elevating Mechanism
Patentees: Charles A. Parske (exact or similar names) - Milwaukee, Milwaukee County, WI Kurt A. Riedel (exact or similar names) - Milwaukee, Milwaukee County, WI USPTO Classifications: 409/227 Tool Categories: metalworking machines : milling machines metalworking machines : metalworking machine mechanisms Assignees: Kearney & Trecker Corp. - West Allis, Milwaukee County, WI Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Nov. 12, 1957 Granted: Aug. 02, 1960 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Kearney & Trecker Co.

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