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XC Patent: XC-1,291
An improved mode of operating variable expansion steam cut-off valves
Patentee: Alexander S. Walbridge (exact or similar names) - Bedford, QC Canada USPTO Classifications: Tool Categories: propulsion and energy : steam engines Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Granted: Nov. 28, 1861 Patent Pictures: Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for A. S. Walbridge
Description: XC patents are Canadian patents issued between 1824 and 1869.

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