US Patent: 851
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| Machinery for manufacturing double-twist screw-augers
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Patentees:
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| Ezra L'Hommedieu (exact or similar names) - Chester, CT |
| Richard N. Watrous (exact or similar names) - Chester, CT |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Granted: |
Jul. 24, 1838 |
| Reissue Information: |
| Reissued as RE72 (Jul. 30, 1845) |
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Jeff Joslin
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Description: |
| The May 1, 1852 issue of Scientific American carried this tidbit: "On the petition of Ezra L'Hommedieu, of Chester, Conn., praying for the extension of a patent granted to him, for an improvement in machinery for manufacturing double twist screw augers, for seven years from the expiration of said patent, which takes place on the 24th July, 1852." |
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