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CA Patent: CA-235,280
Boring mill
Patentee: Albert W. Parkes (exact or similar names) - Dundas, ON Canada USPTO Classifications: Tool Categories: metalworking machines : drilling and boring : vertical boring mills Assignees: John Bertram & Sons Co. - Dundas, ON Canada Manufacturer: John Bertram & Sons Co. - Dundas, ON Canada Witnesses: Unknown	Patent Dates: Granted: Oct. 30, 1923 Patent Pictures: CIPO Data Report data errors or omissions to steward Jeff Joslin "Vintage Machinery" entry for John Bertram & Sons Co.

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