US Patent: 244,629
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| Portable steam-auger
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Patentee:
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| William Francis Leach (exact or similar names) - St. Clair, MI |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
May 11, 1881 |
| Granted: |
Jul. 19, 1881 |
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Jeff Joslin
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Description: |
| This patent was cited in litigation involving patent 369,120 which is considered to be the first successful portable metal drilling machine; this Leach patent was found to be vague and to not keep the "line of thrust in actual alignment with the drill tool", and therefore did not anticipate the later patent. |
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