US Patent: 165,800
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| Lubricator
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Patentees:
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| Samuel H. Davis, Jr. (exact or similar names) - Philadelphia, PA |
| Howard M. Du Bois (exact or similar names) - Philadelphia, PA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Oct. 09, 1874 |
| Granted: |
Jul. 20, 1875 |
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Joel Havens
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