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US Patent: 17,236
Improvement in couplings for shafting
Patentees: Coleman Sellers (exact or similar names) - Philadelphia, PA William Sellers (exact or similar names) - Philadelphia, PA USPTO Classifications: 403/303 Tool Categories: industrial machines : industrial machine mechanisms : industrial machine shaft couplings Assignees: None Manufacturer: William Sellers & Co. - Philadelphia, PA Witnesses: Unknown	Patent Dates: Granted: May 05, 1857 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for William Sellers & Co.
Description: This patent was granted an extension by Act of Congress.

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