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US Patent: 23,521
Variable cut-off for steam-engines
Patentee: Daniel A. Woodbury (exact or similar names) - Rochester, NY USPTO Classifications: 74/3.2 Tool Categories: propulsion and energy : steam engines Assignees: None Manufacturer: D. A. Woodbury & Co. - Rochester, NY Witnesses: Robert Pearson Thomas Pryon	Patent Dates: Granted: Apr. 05, 1859 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Woodbury, Booth & Co.

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