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US Patent: 1,638,030
Pipe Threading Machine
Patentee: Leslie S. Hall (exact or similar names) - Brantford, Brant County, ON, Canada USPTO Classifications: 470/66 Tool Categories: metalworking machines : metal threading machines : pipe threading machines Assignees: Williams Tool Corp. - Erie, Erie County, PA Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Feb. 18, 1924 Granted: Aug. 09, 1927 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for John H. Hall & Sons, Ltd. / Williams Tool Corp.

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