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US Patent: 186,564
Treadle
Patentee: Caleb Hopkins (exact or similar names) - Waltham, Middlesex County, MA USPTO Classifications: 74/42 Tool Categories: propulsion and energy : human powered apparatus Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Jan. 27, 1876 Granted: Jan. 23, 1877 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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