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| Patents for Charles H. Cowdrey | |||||
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| Number | Date | Patentee | Title | Type | |
| 255,418 | Mar. 28, 1882 | C.H. Cowdrey | Self-oiling pulley | industrial machine pulleys and belt drive mechanisms | |
| 273,227 | Feb. 27, 1883 | C.H. Cowdrey | Lathe | wood lathes | |