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| Patents for Gregory-Butts Co. | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,490,200 | Apr. 15, 1924 | E.F. Butts | Molding sander | belt sanders | |
| 1,504,865 | Aug. 12, 1924 | E.F. Butts | Finishing sander for molding | belt sanders | |
| 1,650,863 | Nov. 29, 1927 | E.F. Butts | Double-belt sanding machine | belt sanders | |