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| Number | Title | Issue Date |
| 4682067 | Synchronous electric motor having a disc-shaped permanent magnet rotor The present invention relates to a synchronous electric motor of the type comprising at least one rotor part of substantially annular disc form, magnetized axially so as to present, on its opposite flat faces, a series of magnetic poles of alternate polar... | 07/21/1987 |
| 4658166 | Synchronous electric motor with disc-shaped permanent magnet rotor The present invention relates to a synchronous electric motor of the type comprising at least one rotor part, substantially of annular disc form, magnetized so as to present on at least one of its opposite planar surfaces at least one series of magnetic p... | 04/14/1987 |
