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US Patent: 1,501,218
Pipe-threading machines
Patentee: John Stevenson Imlach (exact or similar names) - Ottawa, ON Canada USPTO Classifications: 29/27B, 29/27R, 409/73 Tool Categories: metalworking machines : metal threading machines : pipe threading machines Assignees: None Manufacturer: Not known to have been produced Witnesses: H. P. Armstrong M. McMillan	Patent Dates: Applied: Nov. 25, 1921 Granted: Jul. 15, 1924 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin

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