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US Patent: 157,695
Metal-Riveting Machines
Patentees: John L. Piper (exact or similar names) - Pittsburg, Allegheny County, PA John A. Nichols (exact or similar names) - Pittsburg, Allegheny County, PA USPTO Classifications: 72/431, 72/446 Tool Categories: specialty machines : riveting machines Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Oct. 28, 1874 Granted: Dec. 15, 1874 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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