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| Patents for George Ferris | |||||
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| Number | Date | Patentee | Title | Type | |
| 144,051 | Oct. 28, 1873 | D.A. Barnes | Can-Openers and Pipe-Cutters | pipe cutters | |
| 161,447 | Mar. 30, 1875 | F. Schwamb | Improvement in cutter-heads | cutterheads | |