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US Patent: 6,682X
Horse power
Patentee: Calvin Emmons (exact or similar names) - New York, NY USPTO Classifications: 185/19 Tool Categories: propulsion and energy : animal powered apparatus Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Granted: Aug. 02, 1831 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Calvin Emmons
Description: The inventor also had a patent for a planing machine, patent 5,648 (reissued as patent RE170).

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