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| Patents for J. W. Martin | |||||
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| Number | Date | Patentee | Title | Type | |
| 968,679 | Aug. 30, 1910 | E. Oehrle | Combination Tool | protractors | |
| 1,006,121 | Oct. 17, 1911 | E. Oehrle | Combination Tool | protractors | |