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| Patents for James F. Du Hamel | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 334,455 | Jan. 19, 1886 | W.J. Muncaster | Metal Bending and Straightening Machine | |
 | 356,820 | Feb. 01, 1887 | C.W. Boynton | Saw-Handle | |
 | 432,144 | Jul. 15, 1890 | W.J. Muncaster | Machine for Polishing Shafting | |