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| Patents for Stillman A. Clemens | |||||
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| Number | Date | Patentee | Title | Type | |
| 25,703 | Oct. 04, 1859 | J.C. Miller, S.A. Clemens, G.H. Clemens | Improvement in lining underground drains | ||
| 33,571 | Oct. 29, 1861 | S.A. Clemens | Improvement in machines for sawing firewood | firewood machines | |