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US Patent: 147,590
Improvement in self-acting spinning-mules
Patentee: Nathan W. Bancroft (exact or similar names) - Worcester, MA USPTO Classifications: 144/242.1, 57/320 Tool Categories: Assignees: None Manufacturer: Not known to have been produced Witnesses: Donald G. Stuart P. Hannay	Patent Dates: Applied: Oct. 18, 1873 Granted: Feb. 17, 1874 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for W. F. Bancroft & Co.

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