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US Patent: 120,823
Improvement in propulsion of canal-boats
Patentee: Joseph M. McMaster (exact or similar names) - Rochester, NY USPTO Classifications: 417/315, 440/13, 440/38, 60/221 Tool Categories: structures : boats and ships transportation : boats and ships Assignees: None Manufacturer: Not known to have been produced Witnesses: A. H. Sargent F. H. Clement	Patent Dates: Granted: Nov. 14, 1871 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Frank H. Clement

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