Granted Patent
Utility
US 4,935,688 · App. 07/322,730
Electrical storage cell life extender
Inventors:
Keku M. Mistry, Thomas O'Sullivan
Patented Case
View Patent ↗
Granted: Jun 19, 1990
Filed: Mar 13, 1989
Inventors
Keku M. Mistry
Thomas O'Sullivan
Assignee (at issue)
Bell Communications Research, Inc.
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.