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| Patents for H. J. Koerth | |||||
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| Number | Date | Patentee | Title | Type | |
| 568,966 | Oct. 06, 1896 | E.E. Boyd, J.T. Wiley | Pipe Wrench | pipe wrenches | |
| 575,564 | Jan. 19, 1897 | C.F. Driver | Combined Pipe and Nut Wrench | wrench jaw components | |
| 597,990 | Jan. 25, 1898 | A.A. Larson | Wrench | pipe wrenches | |