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| Patents for D. L. Gibbs | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 68,298 | Aug. 27, 1867 | D.L. Gibbs | Improvement in mortising machines | |
 | 77,877 | May 12, 1868 | D.L. Gibbs | Improvement in mortising-machines | |
 | 84,817 | Dec. 08, 1868 | D.L. Gibbs | Improvement in mortising-machine | |