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US Patent: 1,619
Improvement in life-preservers or buoyant dresses
Patentee: Rufus Porter (exact or similar names) - Billerica, MA USPTO Classifications: 441/109, 441/111 Tool Categories: transportation : nautical : life preservers Assignees: None Manufacturer: Not known to have been produced Witnesses: Luther A. Taber S. Frederick Porter	Patent Dates: Granted: May 25, 1840 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin

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