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US Patent: 1,260,896
Tapping attachment for boring-machines
Patentee: John F. Halstead (exact or similar names) - Brooklyn, NY USPTO Classifications: 408/124, 408/234, 470/182, 470/96, 74/318 Tool Categories: metalworking machines : drilling and boring : tapping heads and chucks Assignees: Wahlstrom Tool Co. - New York, NY Manufacturer: Wahlstrom Tool Co. - New York, NY Witnesses: Unknown	Patent Dates: Applied: Apr. 21, 1917 Granted: Mar. 26, 1918 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Wahlstrom Tool Co.

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