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| Patents for Otto Spieth | |||||
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| Number | Date | Patentee | Title | Type | |
| 589,668 | Sep. 07, 1897 | C.M. Tussing, H.S. Noble | Wrench | pipe and nut combination wrenches | |
| 600,049 | Mar. 01, 1898 | F.A. Thompson | Calipers | calipers | |