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| Patents for Elkanah Leonard | |||||
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| Number | Date | Patentee | Title | Type | |
| 453 | Nov. 04, 1837 | E. Leonard | Mode of constructing the gages of machines for sawing shingles | shingle machines | |
| RE5 | Oct. 26, 1838 | E. Leonard | Shingle machine | shingle machines | |