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| Patents for Margaret J. Smith | |||||
| Number | Date | Patentee | Title | Type | |
| 133,469 | Nov. 26, 1872 | J. McGrew | Improvement in stave-jointers | barrel making machines | |
| 134,297 | Dec. 24, 1872 | J. McGrew | Improvement in machines for sawing veneers | veneer machines | |