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US Patent: 513,632
Machine for Grinding Spherical or Other Curved Surfaces
Patentee: Rudolph Conrader (exact or similar names) - Erie, Erie County, PA USPTO Classifications: 29/28, 451/140, 451/141, 451/143, 451/285, 451/65, 82/11 Tool Categories: metalworking machines : grinding machines Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Jan. 31, 1893 Granted: Jan. 30, 1894 Reissue Information: Reissued as RE11,593 (Mar. 23, 1897) Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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