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| All Patents in class 266/186 | |||||
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| Number | Date | Patentee | Title | Type | |
| 9,698X | Jun. 02, 1836 | B. Kugler | Blast furnace | steel making furnaces | |
| AI174 | Jul. 28, 1857 | L. Westbrook | Gutta-percha (rubber) mold | ||
| 952,284 | Mar. 15, 1910 | B. de Saint Seine | Smelting-furnace | industrial furnaces | |