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US Patent: 249,130
Rotary mining-drill
Patentee: George D. Whitcomb (exact or similar names) - Chicago, IL USPTO Classifications: 173/150, 173/35, 173/42 Tool Categories: trade specific : miner stoneworking : stone boring and drilling machines Assignees: None Manufacturer: Not known to have been produced Witnesses: John C. MacGregor Minnie B. Gage	Patent Dates: Applied: Mar. 07, 1881 Granted: Nov. 01, 1881 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin

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