Granted Patent
Utility
US 4,734,627 · App. 06/674,548
Brushless D.C. motor having two conductors per phase energized alternately by complementary-conductivity-type semiconductors controlled by the same rotor-position signal, at times modified by a compensating technique
Inventor:
Ernst M. Koerner
Patented Case
View Patent ↗
Granted: Mar 29, 1988
Filed: Nov 26, 1984
Inventor
Ernst M. Koerner
Assignee (at issue)
Papst Motoren GmbH & Co KG
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.