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| All Patents in class 212/346 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 626,276 | Jun. 06, 1899 | A.R. Goldie | Traveling crane or conveyer | |
| 2,305,868 | Dec. 22, 1942 | H.J. Siekmann, W.F. Groene | Work Handling Device | ||