US Patent: 130,361
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| Improvement in Machines for Cutting Teeth on Cylinders
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Patentees:
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| Samuel B. Dean (exact or similar names) - Boston, Suffolk County, MA |
| William T. Nicholson (exact or similar names) - Providence, Providence County, RI |
| Gustavus Ames (exact or similar names) - Oswego, Oswego County, NY |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Granted: |
Aug. 13, 1872 |
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Joel Havens
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