Granted Patent
Utility
US 5,514,488 · App. 08/346,896
Electrochemical secondary cell
Inventors:
Martin Hake, Peter Kramer, Frank Mengel
Patented Case
View Patent ↗
Granted: May 7, 1996
Filed: Nov 30, 1994
Inventors
Martin Hake
Peter Kramer
Frank Mengel
Assignee (at issue)
Varta Batterie 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.