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| Patents for James E. Spam | |||||
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| Number | Date | Patentee | Title | Type | |
| 7,781 | Nov. 19, 1850 | D. Eldridge | Corn-sheller | corn shellers | |
| 46,890 | Mar. 21, 1865 | D. Eldridge | Improvement in fly-wheels | industrial machine mechanisms | |