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CA Patent: CA-413,342
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Patentee: Paul George Rudolf Ringert (exact or similar names) - Guelph, ON Canada USPTO Classifications: Tool Categories: Assignees: Callander Foundry - Guelph, ON Canada Manufacturer: Rockwell Mfg. Co. - Pittsburgh, PA Callander Foundry & Mfg. Co. - Guelph, ON Canada Witnesses: Unknown	Patent Dates: Granted: Jun. 22, 1943 Patent Pictures: CIPO Data Espacenet patent Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Callander Foundry & Mfg. Co.

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