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CA Patent: CA-213,309
Clamp for metal pipes
Patentee: Hugh B. Callander (exact or similar names) - Guelph, ON Canada USPTO Classifications: Tool Categories: Assignees: None Manufacturer: Rockwell Mfg. Co. - Pittsburgh, PA Callander Foundry & Mfg. Co. - Guelph, ON Canada Witnesses: Unknown	Patent Dates: Granted: Sep. 13, 1921 Patent Pictures: CIPO Data Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Callander Foundry & Mfg. Co.

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