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US Patent: 939,735
Thread-cutting tool
Patentee: William Murchey (exact or similar names) - Detroit, MI USPTO Classifications: 408/168, 470/188 Tool Categories: metalworking machines : drilling and boring : tapping heads and chucks Assignees: None Manufacturer: Murchey Machine & Tool Co. - Detroit, MI Witnesses: Charles F. Burton William M. Swan	Patent Dates: Applied: Jun. 12, 1908 Granted: Nov. 09, 1909 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Murchey Machine & Tool Co.
Description: This tapping head is intended for cutting tapered pipe threads.

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