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| Patents for Derwin E. Butler | |||||
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| Number | Date | Patentee | Title | Type | |
| 19,345 | Feb. 16, 1858 | D.E. Butler | Machine for cutting keyboards, &c., for musical instruments | music instrument maker | |
| 22,107 | Nov. 23, 1858 | D.E. Butler | Device for clamping and feeding bolts in felly-sawing machines | wheelwright | |