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US Patent: 824,331
Chain Grate
Patentee: Joseph P. Barnes (exact or similar names) - Rockford, Winnebago County, IL USPTO Classifications: 110/270, 110/274, 74/582 Tool Categories: Assignees: W. F. & John Barnes Co. - Rockford, Winnebago County, IL Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Nov. 16, 1903 Granted: Jun. 26, 1906 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for W. F. & John Barnes Co.

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