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| Patents for Hanna Engineering Works | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,195,349 | Aug. 22, 1916 | P.W. Gates | Lubricator | oil cups | |
| 1,211,431 | Jan. 09, 1917 | A.J. Gates | Lubricator | lubricators | |
| 1,211,432 | Jan. 09, 1917 | P.W. Gates | Lubricator | oil cups | |
| 1,400,282 | Dec. 13, 1921 | P.W. Gates | Molding-machine | ore processing apparatus | |
| 1,404,126 | Jan. 17, 1922 | W.P. Krause | Riveter | riveting machines | |
| 1,620,253 | Mar. 08, 1927 | P.W. Gates | Lubricator | lubricators | |