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| All Patents in class 220/212 | |||||
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| Number | Date | Patentee | Title | Type | |
| 238,343 | Mar. 01, 1881 | W.H. Campbell, E.M. Butler | Combination Wrench | wrench combination tools | |
| 2,543,151 | Feb. 27, 1951 | H.L. Cerniak | Combination Plug and Agitator Crank | wrench combination tools | |