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