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| All Patents in class 159/34 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 7,784X | Nov. 19, 1833 | W. Barrett | Furnace for burning anthracite coal, for heating and evaporating liquids | ||
 | 20,631 | Jun. 22, 1858 | D.M. Cook | Evaporating Pan | |
| AI239 | May 31, 1859 | L.P. Harris | Evaporating saccharine juices | ||
 | RE867 | Dec. 20, 1859 | D.M. Cook | Evaporating Pan | |
 | 35,081 | Apr. 29, 1862 | I. Utter, O. Clarke | Improved Evaporator for Saccharine Juices | |