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US Patent: 1,796,352
Automatic Tapping Head
Patentee: Sydney C. Watson (exact or similar names) - Chicago, Cook County, IL USPTO Classifications: 408/133, 470/182, 74/377 Tool Categories: metalworking machines : drilling and boring : tapping heads and chucks Assignees: Bradford Machine Tool Co. - Cincinnati, Hamilton County, OH Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Aug. 14, 1929 Granted: Mar. 17, 1931 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Bradford Machine Tool Co.

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