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US Patent: 221,950
Gas-governors
Patentee: George Smith Woodruff (exact or similar names) - Grand Rapids, MI USPTO Classifications: 137/505.41, 92/99 Tool Categories: propulsion and energy : steam engines : steam engine governors Assignees: None Manufacturer: George S. Woodruff - Toronto, ON Canada Witnesses: John G. Ridout Donald C. Ridout	Patent Dates: Applied: Jul. 15, 1879 Granted: Nov. 25, 1879 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Geo. S. Woodruff

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