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CA Patent: CA-224,694
Manufacture of piston rings
Patentee: William H. Banfield (exact or similar names) - Toronto, ON Canada USPTO Classifications: Tool Categories: metalworking machines Assignees: None Manufacturer: W. H. Banfield & Sons, Ltd. - Toronto, ON Canada Witnesses: Unknown	Patent Dates: Applied: Jan. 02, 1918 Granted: Oct. 10, 1922 Patent Pictures: CIPO Data Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for W. H. Banfield & Sons
Description: W. H. Banfield & Sons was the Canadian manufacturer of piston rings for McQuay-Norris Mfg. Co. of St. Louis, MO.

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