US Patent: 270,977
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| Auger
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| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Oct. 24, 1882 |
| Granted: |
Jan. 23, 1883 |
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Jeff Joslin (dm)
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Description: |
| Essentially a revisit of his earlier patent (75454), this is another approach to increasing the mass/strength of the working end of the bit. |
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