Granted Patent
Utility
US 5,838,139 · App. 08/785,267
Portable device battery technique
Inventor:
Michael R. Greene
Patented Case
View Patent ↗
Granted: Nov 17, 1998
Filed: Jan 17, 1997
Inventor
Michael R. Greene
Assignee (at issue)
LUCENT TECHNOLOGIES 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.