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| Patents for Frank G. Echols | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 588,056 | Aug. 10, 1897 | F.G. Echols | Screw Cutting Tool | |
| 588,222 | Aug. 17, 1897 | F.G. Echols | Tool Holder | ||
| 602,062 | Apr. 12, 1898 | F.G. Echols | Metal Working Machine | ||
| 610,158 | Aug. 30, 1898 | F.G. Echols | Tool for Cutting Screw Threads | ||
 | 627,299 | Jun. 20, 1899 | F.G. Echols | Metal-working machine | |
| 631,159 | Aug. 15, 1899 | F.G. Echols | Machine for Cold Rolling | ||