Granted Patent
Utility
US 5,739,618 · App. 08/591,786
Electric synchronous machine having slip rings arranged outside the machine housing, and a method for producing it
Inventors:
Johann Kleinburger, Hans Zimmermann
Patented Case
View Patent ↗
Granted: Apr 14, 1998
Filed: Jan 25, 1996
Inventors
Johann Kleinburger
Hans Zimmermann
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.