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US Patent: 464,617
Valve Dressing Machine
Patentees: Charles H. Sampson (exact or similar names) - Minneapolis, Hennepin County, MN Pliny J. Wright (exact or similar names) - Minneapolis, Hennepin County, MN USPTO Classifications: 82/149, 82/172 Tool Categories: specialty machines : valve reseating machines Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Mar. 28, 1891 Granted: Dec. 08, 1891 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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