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US Patent: 480,258
Machine for Grinding Cocks
Patentee: Paul Gerstenkorn (exact or similar names) - Milwaukee, Milwaukee County, WI USPTO Classifications: 451/116 Tool Categories: metalworking machines : grinders : valve cock grinders Assignees: Paul Gerstenkorn - Milwaukee, Milwaukee County, WI Otto Budde - Chicago, Cook County, IL Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Feb. 06, 1892 Granted: Aug. 09, 1892 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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