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| Patents for Nathaniel A. Prentiss | |||||
| Number | Date | Patentee | Title | Type | |
| 162,230 | Apr. 20, 1875 | H.S. Smith, E.J. Granger | Improvement in barrel-head adjusters | barrel making machines | |
| 162,913 | May 04, 1875 | E.J. Granger | Improvement in compound chucks for veneer-cutting machines | wood lathes | |