US Patent: 23,957
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Turning Lathe
Lathe for Turning Irregular Forms
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Patentees:
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| Charles Spring (exact or similar names) - Boston, Suffolk County, MA |
| Andrew Spring (exact or similar names) - Boston, Suffolk County, MA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Granted: |
May 10, 1859 |
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Joel Havens
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Description: |
| The 1873 "Subject-matter index of patents for inventions issued by the United States Patent Office" says that this patent was extended (i.e., had been extended at some point between 1790 and 1873).
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