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US Patent: 360,990
Expansive bit
Patentee: Charles E. Billings (exact or similar names) - Hartford, CT USPTO Classifications: 408/194, 408/195, 408/212, 408/213 Tool Categories: woodworking tools : hand drills : drill bits : adjustable drill bits Assignees: None Manufacturer: Not known to have been produced Witnesses: Emma Taxter Willard Eddy	Patent Dates: Applied: Jan. 08, 1887 Granted: Apr. 12, 1887 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin

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