Granted Patent
Utility
US 6,189,321 · App. 09/289,492
Distributor
Inventors:
Volker Banhardt, Burkhard Josuhn-Kadner, Raiko Milanovic, Volker Schüle, Wolfgang Waldi, Hans-Jurgen Weidemann
Patented Case
View Patent ↗
Granted: Feb 20, 2001
Filed: Apr 9, 1999
Inventors
Volker Banhardt
Burkhard Josuhn-Kadner
Raiko Milanovic
Volker Schüle
Wolfgang Waldi
Hans-Jurgen Weidemann
Assignee (at issue)
ABB PATENT GMBH
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.