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US Patent: 203,934
Stone Polishing Machine
Patentees: Peter Pitkin (exact or similar names) - Rochester, Monroe County, NY John B. Dougherty (exact or similar names) - Rochester, Monroe County, NY USPTO Classifications: 451/270, 451/280 Tool Categories: stoneworking : stone dressing machines Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Mar. 07, 1878 Granted: May 21, 1878 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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