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| Patents for Simon Roos | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 455,683 | Jul. 07, 1891 | M. von Dolivo-Dobrowolsky | Transmission of alternating currents of different phase | |
 | 456,804 | Jul. 28, 1891 | M. von Dolivo-Dobrowolsky | Alternating-current motor | |
 | 503,038 | Aug. 08, 1893 | M. von Dolivo-Dobrowolsky | Regulation of alternating-current motors | |
 | 540,153 | May 28, 1895 | M. von Dolivo-Dobrowolsky | Apparatus for determining differences between phases of two electric alternating currents | |