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| Patents for Ludwig Gutmann | |||||
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| Number | Date | Patentee | Title | Type | |
| 458,162 | Aug. 25, 1891 | L. Gutmann | Electric motor | electric motors | |
| 458,164 | Aug. 25, 1891 | L. Gutmann | Method of operating alternating electric motor | electric motors | |
| 530,176 | Dec. 04, 1894 | L. Gutmann | Alternating-current motor and method of operating same | electric motors | |
| 530,177 | Dec. 04, 1894 | L. Gutmann | Alternating electric motor | electric motors | |