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| All Patents in class 110/206 | |||||
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| Number | Date | Patentee | Title | Type | |
| 9,473X | Mar. 04, 1836 | N. Lockling | Consuming smoke | ||
| 334,066 | Jan. 12, 1886 | T.S. Wilkin | Smoke Consuming Furnace | industrial furnaces | |