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US Patent: 437,713
Method of Cutting Screw Threads
Patentees: Jay H. Newbury (exact or similar names) - Guilderland, Albany County, NY George A. Chapman (exact or similar names) - Guilderland, Albany County, NY USPTO Classifications: 470/96 Tool Categories: metalworking machines : metal threading machines : pipe threading machines Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Apr. 04, 1890 Granted: Oct. 07, 1890 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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