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US Patent: RE4,753
Improvements in Traction Engines
Patentee: Robert Crouch Parvin (exact or similar names) - Philadelphia, PA USPTO Classifications: 180/9.38, 305/196, 305/51 Tool Categories: propulsion and energy : steam apparatus : steam traction engines : traction engine tracks Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Granted: Feb. 13, 1872 Reissue Information: Reissue of 119,878 (Oct. 10, 1871) Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Northwestern Parvin Steam Motor Mfg. Co.

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