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US Patent: 9,322
Making Sheet Metal Vessels Improvement in Double Seaming Machines
Patentee: Walter Hamilton (exact or similar names) - Elmira, Chemung County, NY USPTO Classifications: 72/50 Tool Categories: trade specific : tinsmith Assignees: None Manufacturer: Roys & Wilcox - East Berlin, Hartford County, CT Witnesses: Unknown	Patent Dates: Granted: Oct. 12, 1852 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Roys & Wilcox

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