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| Patents for Onni Lindfors | |||||
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| Picture | Number | Date | Patentee | Title | |
| 2,490,877 | Dec. 13, 1949 | O. Lindfors | Motor Starting Control Switch | ||
| 2,502,098 | Mar. 28, 1950 | O. Lindfors | Voltage Regulator | ||
| 2,502,099 | Mar. 28, 1950 | O. Lindfors | Single Phase Motor Starting | ||
| 2,682,631 | Jun. 29, 1954 | O. Lindfors | Single Phase Motor Control | ||