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US Patent: 1,355,780
Machine for Backing Off the Teeth of Hobs for Cutting Screw Threads
Patentee: George Richards (exact or similar names) - Westminster, London, England USPTO Classifications: 409/317, 409/326, 76/107.1 Tool Categories: metalworking machines : metal lathes : backing off lathes Assignees: Richards Thread Milling Machine Co., Ltd. - Westminster, London, England Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Aug. 21, 1919 Granted: Oct. 12, 1920 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Richards Thread Milling Machine Co., Ltd

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