Granted Patent
Utility
US 6,833,658 · App. 10/452,209
Middle electrode with precious metal reinforcement and a process for producing the same
Inventor:
Werner Niessner
Patented Case
View Patent ↗
Granted: Dec 21, 2004
Filed: Jun 3, 2003
Inventor
Werner Niessner
Assignee (at issue)
BERU Aktiengesellschaft
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.