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US Patent: 483,281
Driving Mechanism for Road Engines
Patentee: Calvin F. Christopher (exact or similar names) - Spartanburg, Spartanburg County, SC USPTO Classifications: 74/351 Tool Categories: propulsion and energy : steam apparatus : steam traction engines : traction engine propulsion components Assignees: Calvin F. Christopher - Spartanburg, Spartanburg County, SC David R. Duncan - Spartanburg, Spartanburg County, SC Thomas C. Duncan - Spartanburg, Spartanburg County, SC Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Dec. 02, 1891 Granted: Sep. 27, 1892 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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