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| Patents for Oliver A. Olmsted | |||||
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| Number | Date | Patentee | Title | Type | |
| 116,988 | Jul. 11, 1871 | O.A. Olmsted | Improvement in shingle-machines | shingle machines | |
| 127,507 | Jun. 04, 1872 | O.A. Olmsted | Improvement in Traction Engines | steam traction engines | |