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| Patents for A. C. Harmon | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 527,600 | Oct. 16, 1894 | F.K. Etherington | Door-Lock-Marking Gage | |
 | 545,944 | Sep. 10, 1895 | E. Champane | Wrench | |
 | 562,329 | Jun. 16, 1896 | H.A. Coolidge | Wrench attachment for brace | |