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US Patent: 527,748
Grinding Mechanism
Patentee: William H. Hill (exact or similar names) - Denver, Arapahoe County, CO USPTO Classifications: 451/114 Tool Categories: specialty machines : valve reseating machines Assignees: William H. Hill - Denver, Arapahoe County, CO Joshua Piccioli - Denver, Arapahoe County, CO Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Jun. 22, 1894 Granted: Oct. 16, 1894 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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