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US Patent: 421,661
Plowshare
Patentee: George S. Briggs (exact or similar names) - Rockford, IL USPTO Classifications: 172/745 Tool Categories: agricultural : plows Assignees: L. A. Weyburn Co. - Rockford, IL Manufacturer: Not known to have been produced Witnesses: Lewis A. Wayburn L. L. Morrison	Patent Dates: Applied: Sep. 10, 1889 Granted: Feb. 18, 1890 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens Vintage Machinery entry for Weyburn Co.

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