US Patent: RE107
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| Improvement in wood-screws
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Patentee:
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| Thomas J. Sloan (exact or similar names) - New York, NY |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Granted: |
Feb. 22, 1848 |
| Reissue Information: |
| Reissue of 4,704 (Aug. 20, 1846) |
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Jeff Joslin
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Description: |
| The reissue has an improved description of the then-current state of the art, and a clearer explanation of the novelty of Sloan's new design: the threaded portion of the screw is mostly cylindrical, but close to the end of the screw it tapers to a point. The threads are of constant pitch. The combination of these three things was new, and constitute what we think of as the modern wood-screw.The patent was extended for seven years. |
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