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US Patent: 643,553
Attachment for Screw Cutting Machines
Patentee: Otto Sroka (exact or similar names) - Berlin, Brandenburg, Germany USPTO Classifications: 29/57, 470/177, 470/180, 470/57 Tool Categories: metalworking machines : metal lathes : metal lathe accessories and attachments metalworking machines : metal lathes : screwcutting lathes Assignees: Albrecht Schwartzkopff - Berlin, Brandenburg, Germany Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Jan. 24, 1899 Granted: Feb. 13, 1900 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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