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US Patent: 7,972
Steam drilling-machine
Patentee: Joseph W. Fowle (exact or similar names) - Boston, MA USPTO Classifications: 173/191, 91/218 Tool Categories: specialty machines : mining apparatus Assignees: None Manufacturer: Not known to have been produced Witnesses: Ezra Lincoln R. J. Fennelly	Patent Dates: Granted: Mar. 11, 1851 Reissue Information: Reissued as RE2,275 (Jun. 05, 1866) Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin
Description: See patent 6,237 for a discussion of this patent. This patent was both extended and reissued.

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