US Patent: RE4,539
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| Improvement in water-wheels
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Patentee:
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| John Tyler (exact or similar names) - West Lebanon, NH |
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Patent Dates:
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| Granted: |
Aug. 29, 1871 |
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Jeff Joslin
Vintage Machinery entry for John Tyler
Justification of this unusual reissue and extension
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Description: |
| This reissue is highly unusual because it was applied for and granted after the original patent had already expired. The original patent was important but despite Tyler's diligent efforts he had not made much money off of it and the Patent Office agreed that he deserved to have the patent claims strengthened and the patent term lengthened. See the link below the patent image for the Patent Office's explanation of this reissue. |
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