| Patents for Simon Roos |
Patents 1 -
4
of 4
      |
| Number | Date | Patentee | Title | Type |
| 455,683 | Jul. 07, 1891 | M. von Dolivo-Dobrowolsky | Transmission of alternating currents of different phase | electric distribution systems |
| 456,804 | Jul. 28, 1891 | M. von Dolivo-Dobrowolsky | Alternating-current motor | induction motors |
| 503,038 | Aug. 08, 1893 | M. von Dolivo-Dobrowolsky | Regulation of alternating-current motors | induction motors |
| 540,153 | May 28, 1895 | M. von Dolivo-Dobrowolsky | Apparatus for determining differences between phases of two electric alternating currents | electrical measuring apparatus |
