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| All Patents in class 384/393 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 165,852 | Jul. 20, 1875 | C.H. Mellor | Improvement in loose pulleys for shafting | |
| 625,373 | May 23, 1899 | K. Widmann | Automatic Lubricator for Loose Pulleys | ||
 | 2,186,477 | Jan. 09, 1940 | L. Coddington | Oiling system | |