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| Patents for John Fitzgerald | |||||
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| Picture | Number | Date | Patentee | Title | |
| 8,475X | Oct. 30, 1834 | J. Fitzgerald, D. Fitzgerald | Conical grain grinder | ||
| 8,476X | Oct. 30, 1834 | J. Fitzgerald, D. Fitzgerald | Grain thrashing machine | ||
 | 143,565 | Oct. 14, 1873 | H. Fletcher | Improvement in cutter-heads | |
 | 173,885 | Feb. 22, 1876 | A. Berry | Improvement in Hollow Augers | |