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US Patent: 481,598
Rock-drilling machine
Patentee: William X. Stevens (exact or similar names) - Washington, DC USPTO Classifications: 173/30, 173/35, 173/37 Tool Categories: handheld power tools : handheld impact tools : impact chisels and drills Assignees: None Manufacturer: Not known to have been produced Witnesses: M. C. Hillyard William L. Speiden	Patent Dates: Applied: Oct. 08, 1891 Granted: Aug. 30, 1892 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for W. X. Stevens

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