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| Patents for Ernst W. Kopke | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,899,202 | Feb. 28, 1933 | L.J. Struebig, E.W. Kopke | Cane Mill | sugar cane apparatus | |
| 2,190,029 | Feb. 13, 1940 | E.W. Kopke | Cane Mill | sugar cane apparatus | |
| 2,797,635 | Jul. 02, 1957 | E.W. Kopke | Cane Crushing Mill | sugar cane apparatus | |