US Patent: AI279
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| Hollow auger
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Patentee:
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| Mahlon Gregg (exact or similar names) - Philadelphia, PA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Granted: |
May 15, 1860 |
| Reissue Information: |
| Reissue of 19,292 (Feb. 09, 1858) |
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Jeff Joslin
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Description: |
| Only the patent drawing is available. "Additional Improvement" patents were issued between 1836 and 1860 to allow patentees an easier way to make additional claims, improvements or clarifications. This drawing shows a hollow auger intended to be used with Gregg's Machine for Cutting Tenons on Spokes. |
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