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US Patent: RE6,292
Improvement in machines for drilling rock
Patentee: Simon Ingersoll (exact or similar names) - Brooklyn, NY USPTO Classifications: 173/144, 173/37, 173/39, 92/33 Tool Categories: specialty machines : mining apparatus Assignees: Ingersoll Rock Drill Co. - New York, NY Manufacturer: Ingersoll Rock Drill Co. - New York, NY Witnesses: P. Smith Henry C. Sergeant	Patent Dates: Applied: Feb. 03, 1875 Granted: Feb. 16, 1875 Reissue Information: Reissue of 112,254 (Feb. 28, 1871) Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Ingersoll-Rand Co.

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