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| All Patents in class 470/206 | |||||
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| Number | Date | Patentee | Title | Type | |
| 84,410 | Nov. 24, 1868 | J.T. Campbell | Improvement in Nut Planers | nut or bolt making machines | |
| 91,841 | Jun. 29, 1869 | G.A. Gray, Jr. | Nut Mandrel | mandrels and arbors | |
| 278,896 | Jun. 05, 1883 | P. Duffy | Nut Arbor | mandrels and arbors | |
| 311,479 | Feb. 03, 1885 | G.B. Foote | Nut Arbor | mandrels and arbors | |