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CA Patent: CA-739
Improvements on those parts of steam engines called and known as the steam chest valve and valve seat
Patentee: I. W. Forbes (exact or similar names) - Windsor, ON Canada USPTO Classifications: Tool Categories: propulsion and energy : steam engines : steam engine valves Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Granted: Dec. 10, 1870 Patent Pictures: CIPO Data Report data errors or omissions to steward Joel Havens

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