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| All Patents in class 411/517 | |||||
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| Number | Date | Patentee | Title | Type | |
| 858,131 | Jun. 25, 1907 | H.J. Aichele | Cap for Magazine Tools | screwdriver handles | |
| 1,418,379 | Jun. 06, 1922 | J.D. Karle | Method of securing ball-bearings to shafts | industrial machine bearings | |
| 1,932,796 | Oct. 31, 1933 | N.F. McNaught | Grease ram | ||
| 2,237,465 | Apr. 08, 1941 | W.F. Zimmermann | Change Gear Retaining Lock | metalworking speed changing mechanisms | |
| 2,487,803 | Nov. 15, 1949 | H. Heimann | Spring retaining ring | fasteners | |