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| Patents for E. O. Pratt | |||||
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| Number | Date | Patentee | Title | Type | |
| 318,649 | May 26, 1885 | W.A. Patrick | Shaft-bearing | industrial machine bearings | |
| 394,507 | Dec. 11, 1888 | A.F. Robbins | Mainspring Winder | watchmaker | |