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| Patents for E. T. Prindle | |||||
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| Number | Date | Patentee | Title | Type | |
| 77,211 | Apr. 28, 1868 | E.T. Prindle | Improvement in Cutting Tools for Planing and Milling Machines | metal planer tools | |
| 454,093 | Jun. 16, 1891 | R. Ryan, S. Udstad | Rod Packing | steam engine packing | |