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| All Patents in class 411/222 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 212,413 | Feb. 18, 1879 | J.H. Vinton | Lathe-Chuck | ||
| 986,255 | Mar. 07, 1911 | W.A. Whitney | Nut Lock | ||
| 1,940,455 | Dec. 19, 1933 | A.E. Kilpela | Gear Retaining Means | ||