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CA Patent: CA-253,991
Cutting off and reaming attachment for threading machines
Patentee: Leslie S. Hall (exact or similar names) - Erie, PA USPTO Classifications: Tool Categories: metalworking machines : metal threading machines : pipe threading machines Assignees: Williams Tool Corp. - Erie, PA Manufacturer: Williams Tool Corp. - Erie, PA Williams Tool Corp. of Canada, Ltd. - Brantford, ON Canada Witnesses: Unknown	Patent Dates: Granted: Sep. 22, 1925 Patent Pictures: CIPO Data Report data errors or omissions to steward Jeff Joslin "Vintage Machinery" entry for John H. Hall & Sons | Williams Tool Corp.

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