Granted Patent
Utility
US 5,134,682 · App. 07/719,505
Driver circuit for a d.c. motor without commutator
Inventor:
Rolf Muller
Patented Case
View Patent ↗
Granted: Jul 28, 1992
Filed: Jun 24, 1991
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.