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| Patents for F. R. Butts | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 272,031 | Feb. 13, 1883 | W. Cronk | Barn Door Hanger | |
 | 288,980 | Nov. 27, 1883 | W. Cronk | Stay Roller for Sliding Doors | |