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| Patents for F. A. Butler | |||||
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| Number | Date | Patentee | Title | Type | |
| 198,216 | Dec. 18, 1877 | H. Butler, H. Ross, Sr. | Improvement in machines for upsetting bars and tires | tire shrinkers | |
| 659,778 | Oct. 16, 1900 | A.R. Weaver | Lathe Chuck for Grinding Watch Crystals | watchmaking machinery | |