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