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| All Patents in class 212/246 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 210,850 | Dec. 17, 1878 | L.H. Hall | Imprrovement in hoisting-machines | |
| RE9,095 | Feb. 24, 1880 | L.H. Hall | Hoisting-machine | ||
| 335,888 | Feb. 09, 1886 | W.F. Brian | Hay Derick | ||