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| Patents for Robert F. Drury | |||||
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| Number | Date | Patentee | Title | Type | |
| 349,203 | Sep. 14, 1886 | B.B. Smith, J.F. Bennett | Draftsman's Compass | compasses | |
| D17,413 | Jun. 28, 1887 | W.H. Clarke | Design for Rasp or File | files | |