Granted Patent
Utility
US 5,739,693 · App. 08/299,301
Method for detecting ground faults on the conductors of an electrical machine
Inventor:
Michael Pfiffner
Patented Case
View Patent ↗
Granted: Apr 14, 1998
Filed: Sep 1, 1994
Inventor
Michael Pfiffner
Assignee (at issue)
Asea Brown Boveri, S.A.
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.