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| Patents for M. Gardner | |||||
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| Picture | Number | Date | Patentee | Title | |
 | RE3,121 | Sep. 15, 1868 | C.H. Riggs | Planer Chuck | |
 | CA-69 | Sep. 18, 1869 | M. Gardner | An improvement in the furnaces of steam engine boilers | |
 | 142,570 | Sep. 09, 1873 | W.J. Innes | Wrenches | |