US Patent: 220,290
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| Improvement in stocks for grinding and drilling tools
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Patentee:
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| James M. Hunter (exact or similar names) - Boston, MA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Mar. 03, 1879 |
| Granted: |
Oct. 07, 1879 |
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Patent Pictures:
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Hunter 220,290 |
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George Langford
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Description: |
| As titled this hand drill is designed for use as a grinder or drill. The pinions and main plate are not geared but held to each other via a spring loaded mechanism. |
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