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| Patents for Darwin V. Miller | |||||
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| Number | Date | Patentee | Title | Type | |
| 283,801 | Aug. 28, 1883 | D.V. Miller | Improvement in Ratchet-Wrenches | ratchet wrenches | |
| 304,542 | Sep. 02, 1884 | D.V. Miller | Ratchet Wrench | ratchet wrenches | |