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| Patents for David Drummond | |||||
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| Number | Date | Patentee | Title | Type | |
| 98,933 | Jan. 18, 1870 | D. Drummond | Improvement in screw-drivers | screwdrivers | |
| 107,765 | Sep. 27, 1870 | D. Drummond, P.N. Drake | Cutter Adjuster for Splint Planes | plane cutter adjustments | |