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US Patent: 157,779
Standard Gauges
Patentee: Quimby S. Backus (exact or similar names) - Winchendon, MA USPTO Classifications: 33/544.4 Tool Categories: Assignees: None Manufacturer: Not known to have been produced Witnesses: H. L. Wattenburg G. M. Plympton	Patent Dates: Applied: Jun. 16, 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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