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| Patents for Wm. N. Cromwell | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 512,709 | Jan. 16, 1894 | W.G. Johnson | Wrench | |
 | 573,806 | Dec. 22, 1896 | T.C. Gates, C.A. Bigelow | Wrench | |
 | 598,591 | Feb. 08, 1898 | F. Barrell | Wrench Or Holding Device | |