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| Patents for George P. Butler | |||||
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| Number | Date | Patentee | Title | Type | |
| 970,789 | Sep. 20, 1910 | G.P. Butler | Expansible Bit | adjustable drill bits | |
| 1,025,109 | Apr. 30, 1912 | G.P. Butler | Auger-Bit | auger bits | |
| 1,379,332 | May 24, 1921 | G.P. Butler | Expansion-bit | adjustable drill bits | |
| 1,391,242 | Sep. 20, 1921 | G.P. Butler | Process For Making Hand Tools | screwdrivers | |