US Patent: AI3
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| Horse Power
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Patentees:
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| John Heberling (exact or similar names) - Harrison County, OH |
| William E. Lukens (exact or similar names) - Harrison County, OH |
| Henry Heberling (exact or similar names) - Harrison County, OH |
| Asa Trahern (exact or similar names) - Harrison County, OH |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Granted: |
Apr. 04, 1838 |
| Reissue Information: |
| Reissue of 9,216X (Oct. 28, 1835) |
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Joel Havens
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Description: |
| In the United States, the term "Additional Improvement Patents" refers to a specific, historical category of patents used between 1837 and 1861. Under the Patent Act of 1836, an inventor could add improvements to their already existing patent rather than filing an entirely new application.
AI (Additional Improvements) patents were issued between 1836 and 1861 and only 318 were ever issued.
James A. Paulaskas' 1977 book, "Additional Improvement Patents, 1837-1861", provides completely different information on AI3 then what is shown here, which is taken straight from the USPTO database. It gives the AI patent issue date as 1838-02-22, and is an additional improvement on patent X8,389 to William Woolley, "bedstead for the sick". |
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