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US Patent: 7,311
Lathe for turning a peculiar species of curve Lathe for making pistons for rotary steam-engines
Patentee: Henry G. Thompson (exact or similar names) - New York, NY USPTO Classifications: 142/6, 144/144.1, 144/193.1 Tool Categories: metalworking machines : metal lathes Assignees: None Manufacturer: Not known to have been produced Witnesses: Causa Browne William Bishop	Patent Dates: Granted: Apr. 23, 1850 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Henry G. Thompson & Son

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