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| Patents for Peter Lowentraut | |||||
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| Number | Date | Patentee | Title | Type | |
| 226,490 | Apr. 13, 1880 | J.W. Calef | Wrench | self-adjust wrenches | |
| 273,461 | Mar. 06, 1883 | J.W. Calef | Improved Self-Adjusting Wrench | self-adjust wrenches | |
| 530,419 | Dec. 04, 1894 | S.J. Johnston | Combination tool | brace wrenches | |