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| Patents for James H. Bancroft | |||||
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| Number | Date | Patentee | Title | Type | |
| 98,644 | Jan. 04, 1870 | G.C. Taft | Wrench | screw adjust wrenches | |
| 135,613 | Feb. 04, 1873 | E.J. Worcester | Improvement in drilling-machines | drill presses | |
| RE5,417 | May 20, 1873 | G.C. Taft | Improvement in Letter Copying Presses | ||