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| Patents for Francis G. Echols | |||||
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| Number | Date | Patentee | Title | Type | |
| 731,870 | Jun. 23, 1903 | F.G. Echols | Indexing Mechanism | ||
| 731,871 | Jun. 23, 1903 | F.G. Echols | Friction Indexing Mechanism | indexers and dividers | |
| 731,872 | Jun. 23, 1903 | F.G. Echols | Motor Mechanism | indexers and dividers | |