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US Patent: 444,980
Traction Engine or Road Roller
Patentee: Martin E. Hershey (exact or similar names) - Harrisburg, Dauphin County, PA USPTO Classifications: 180/36 Tool Categories: propulsion and energy : steam apparatus : steam traction engines propulsion and energy : steam apparatus : steam rollers Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Jun. 30, 1890 Granted: Jan. 20, 1891 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Harrisburg Foundry & Machine Works

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