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| Patents for George H. Kolker | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 220,626 | Oct. 14, 1879 | W.D. Leavitt | Improvement in machines for manufacturing flour | |
 | 233,159 | Oct. 12, 1880 | J.B. Mooney | Steamboat-staging | |
 | 242,468 | Jun. 07, 1881 | J. Mills | Hub-lathe | |
 | 248,609 | Oct. 25, 1881 | J. Powell | Lubricator | |