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| Patents for C. H. Cowdrey Machine Works | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 255,418 | Mar. 28, 1882 | C.H. Cowdrey | Self-oiling pulley | |
 | 273,227 | Feb. 27, 1883 | C.H. Cowdrey | Lathe | |
 | 474,856 | May 17, 1892 | C.F. Peterlein | Back-knife gage-lathe | |