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All Patents in class 110/309 | |||||
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Picture | Number | Date | Patentee | Title | |
![]() | 95,849 | Oct. 12, 1869 | B.F. Sturtevant | Hot Air Furnace | |
713,012 | Nov. 04, 1902 | G.B. Mitchell | Combination Blast Furnace | ||
782,875 | Feb. 21, 1905 | H. Price | Forge |