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| Patents for David M. Lackie | |||||
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| Number | Date | Patentee | Title | Type | |
| 624,439 | May 09, 1899 | A.L. Adams | Expansion-Bit | adjustable drill bits | |
| 624,849 | May 09, 1899 | J.C. Nicol | Nipple Wrench | spoke nipple wrenches | |