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| Patents for Zachary T. Furbish | |||||
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| Number | Date | Patentee | Title | Type | |
| 247,669 | Sep. 27, 1881 | Z.T. Furbish, C.H. Mallett | Screwdriver | ratcheting screwdrivers | |
| 275,235 | Apr. 03, 1883 | Z.T. Furbish, C.H. Mallett | Screwdriver | ratcheting screwdrivers | |
| 307,187 | Oct. 28, 1884 | Z.T. Furbish, F.L. Hamlen | Ratchet Screw-Driver | ratcheting screwdrivers | |
| 315,137 | Apr. 07, 1885 | Z.T. Furbish, F.L. Hamlen | Ratchet Screw-Driver | ratcheting screwdrivers | |