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| All Patents in class 411/929 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 135,898 | Feb. 18, 1873 | T. English | Screw Bolts and Nuts | ||
| 1,829,797 | Nov. 03, 1931 | J. Hartness | Thread Gauging | ||
| 1,940,455 | Dec. 19, 1933 | A.E. Kilpela | Gear Retaining Means | ||