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US Patent: 2,177,820
Boring Chuck
Patentee: Harry F. Brown (exact or similar names) - Detroit, Wayne County, MI USPTO Classifications: 279/6 Tool Categories: metalworking machines : drilling and boring : boring heads Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Jun. 23, 1937 Granted: Oct. 31, 1939 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens
Description: This patent was improved by patent #2,276,462.

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