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| All Patents in class 212/346 | |||||
| Number | Date | Patentee | Title | Type | |
| 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 | metalworking machine mechanisms | |