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| Patents for J. E. Hoppen | |||||
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| Number | Date | Patentee | Title | Type | |
| 211,096 | Jan. 07, 1879 | J.E. Hoppen | Improvement in grindstone-frames | grindstone frames | |
| 295,553 | Mar. 25, 1884 | J.E. Hoppen | Hanger for shafting | industrial machine shaft hangers | |
| 553,676 | Jan. 28, 1896 | J.E. Hoppen | Shaft-hanger and lubricator therefor | industrial machine shaft hangers | |