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| Patents for Nathaniel A. Chapman | |||||
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| Picture | Number | Date | Patentee | Title | |
 | RE6,247 | Jan. 26, 1875 | J.M. Albertson | Improvement in horse-powers | |
 | 162,786 | May 04, 1875 | J.M. Albertson | Improvement in baling-presses | |