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| Patents for M. T. Crawford | |||||
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| Number | Date | Patentee | Title | Type | |
| 777,605 | Dec. 13, 1904 | A.J. Knowlton, O.B. Creamer | Taper Calipers | calipers | |
| 777,606 | Dec. 13, 1904 | A.J. Knowlton, O.B. Creamer | Taper Calipers | calipers | |