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| Patents for Elmer E. Hanna | |||||
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| Number | Date | Patentee | Title | Type | |
| 525,443 | Sep. 04, 1894 | P.W. Gates, E.E. Hanna, C.L. Carman | Gyrating crusher | ore processing apparatus | |
| 606,543 | Jun. 28, 1898 | E.E. Hanna | Self-lubricating engine | internal combustion engines | |
| 691,135 | Jan. 14, 1902 | E.E. Hanna | Ore-crusher | ore processing apparatus | |
| 705,749 | Jul. 29, 1902 | A.J. Gates | Cornish roll | ore processing apparatus | |