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US Patent: 426,710
Die for Making Rock Drills
Patentee: John Cahill (exact or similar names) - Tarrytown, Westchester County, NY USPTO Classifications: 72/429, 72/467 Tool Categories: metalworking machines : forging machines : forging dies tool making : making drills and augers Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Jan. 31, 1890 Granted: Apr. 29, 1890 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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