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| Patents for George H. Kolker | |||||
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| Number | Date | Patentee | Title | Type | |
| 220,626 | Oct. 14, 1879 | W.D. Leavitt | Improvement in machines for manufacturing flour | grist mills | |
| 233,159 | Oct. 12, 1880 | J.B. Mooney | Steamboat-staging | nautical | |
| 242,468 | Jun. 07, 1881 | J. Mills | Hub-lathe | wood lathes | |