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US Patent: 150,687
Screw Cutting Machines
Patentees: Joseph L. Hall (exact or similar names) - Cincinnati, Hamilton County, OH Henry Millward (exact or similar names) - Cincinnati, Hamilton County, OH USPTO Classifications: 408/147, 408/180, 470/73 Tool Categories: metalworking machines : metal lathes : screwcutting lathes Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Apr. 06, 1874 Granted: May 12, 1874 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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