Granted Patent
Utility
US 4,379,984 · App. 06/250,011
Brushless DC motor driven by complementary type transistors
Inventor:
Rolf Muller
Patented Case
View Patent ↗
Granted: Apr 12, 1983
Filed: Apr 1, 1981
Inventor
Rolf Muller
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.