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US Patent: 217,506
Traction Engine and Steam Plow
Patentee: Benjamin S. Benson (exact or similar names) - Baltimore, MD USPTO Classifications: 172/116, 172/216, 172/292, 172/316, 301/5.1, 305/124, 305/145, 305/52 Tool Categories: propulsion and energy : steam apparatus : steam traction engines Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Nov. 19, 1878 Granted: Jul. 15, 1879 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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