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| Patents for E. F. Parker | |||||
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| Number | Date | Patentee | Title | Type | |
| 124,212 | Mar. 05, 1872 | W.J. Liddell | Improvement in horse-powers | animal powered apparatus | |
| 211,576 | Jan. 21, 1879 | E.W. Arndt, C.A. Lawton | Improvement in bran-dusters | grain hullers | |
| 229,096 | Jun. 22, 1880 | E.C. Clark | Hub-turning machine | wood lathes | |