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| Patents for Passaic Machine Works | |||||
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| Number | Date | Patentee | Title | Type | |
| 30,549 | Oct. 30, 1860 | W. Watts | Hanger and box for shafting | industrial machine shaft hangers | |
| 39,852 | Sep. 08, 1863 | W. Watts | Steam Pump | steam pumps | |
| 42,054 | Mar. 22, 1864 | W. Watts, F. Willcox, D.F. Tompkins | Improvement in spikes and nails | ||