US Patent: 489,224
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Tapping-machine
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Patentee:
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William W. Doolittle (exact or similar names) - Chicago, IL |
Manufacturer: |
Not known to have been produced |
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Patent Dates:
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Applied: |
Jul. 16, 1892 |
Granted: |
Jan. 03, 1893 |
USPTO (New site tip) Google Patents
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Jeff Joslin Vintage Machinery entry for Crane Co.
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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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