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| Patents for E. O. Hagan | |||||
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| Number | Date | Patentee | Title | Type | |
| 264,111 | Sep. 12, 1882 | M. Shawver | Saw-mill dog | sawmill dogs | |
| 706,042 | Aug. 05, 1902 | C.C. Fields | Wrench | pipe wrenches | |
| 744,295 | Nov. 17, 1903 | W.U. Colthar | Spring-motor | sewing machines | |
| 784,164 | Mar. 07, 1905 | W.U. Colthar, C.H. Kay | Vibrator | medical devices | |
| 862,216 | Aug. 06, 1907 | R.P. Thompson | Bearing | ||