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| Patents for Wm. Koerth | |||||
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| Number | Date | Patentee | Title | Type | |
| 863,551 | Aug. 13, 1907 | M.A. Mulrony | Wrench | wrench handle components | |
| 995,947 | Jun. 20, 1911 | J.A. Borland | Wrench | pipe wrenches | |
| 1,083,851 | Jan. 06, 1914 | O. Mullins | Wrench | quick adjust wrenches | |
| 1,135,896 | Apr. 13, 1915 | F.S. Hay | Wrench | quick adjust wrenches | |
| 1,437,774 | Dec. 05, 1922 | E.K. Boinski, J.C. Piechocki | Wrench | quick adjust wrenches | |