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| Patents for Duane H. Church | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 432,791 | Jul. 22, 1890 | D.H. Church | Lathe for Turning Pinion Shafts | |
 | 486,609 | Nov. 22, 1892 | D.H. Church | Uprighting Lathe | |
 | 532,532 | Jan. 15, 1895 | D.H. Church | Staff Turning Lathe | |
 | 584,987 | Jun. 22, 1897 | D.H. Church | Drilling Machine | |