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US Patent: 489,224
Tapping-machine
Patentee: William W. Doolittle (exact or similar names) - Chicago, IL USPTO Classifications: 408/38, 409/903 Tool Categories: metalworking machines : drilling and boring : tapping machines Assignees: Crane Co. - Chicago, IL Manufacturer: Not known to have been produced Witnesses: Aloysia Helmich H. D. Hollister	Patent Dates: Applied: Jul. 16, 1892 Granted: Jan. 03, 1893 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Crane Co.
Description: The assignee manufactured steam engines. So far as we can tell, this tapping machine was for their own use and was not manufactured for sale.

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