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| Patents for Edward Duffy | |||||
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| Number | Date | Patentee | Title | Type | |
| 150,840 | May 12, 1874 | R. Swarbrick, E. Duffy | Treadles | human powered apparatus | |
| 360,378 | Mar. 29, 1887 | E. Duffy | Plumb Level | inclinometers | |