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US Patent: 996,311
Die-head of screwing-machines
Patentees: James Virtue (exact or similar names) - Birmingham, England Thomas Philip Chatwin (exact or similar names) - Birmingham, England Thomas Chatwin (exact or similar names) - Birmingham, England USPTO Classifications: 279/71, 408/176, 470/75 Tool Categories: metalworking machines : metal threading machines Assignees: None Manufacturer: Thomas Chatwin Ltd. - Birmingham, England Witnesses: J. Beaumont Percival F. Gilbert Brettell	Patent Dates: Applied: Mar. 23, 1910 Granted: Jun. 27, 1911 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Thomas Chatwin

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