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| Patents for N. E. Robinson | |||||
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| Number | Date | Patentee | Title | Type | |
| 166,673 | Aug. 10, 1875 | A.A. Wood | Improvement in Hollow Augers | hollow bits | |
| 174,399 | Mar. 07, 1876 | A.A. Wood | Spoke Shave | spokeshaves | |