Granted Patent
Utility
US 4,237,897 · App. 05/957,411
Battery life extender
Inventors:
Russell R. Beane, Brian M. Mann
Patented Case
View Patent ↗
Granted: Dec 9, 1980
Filed: Nov 3, 1978
Inventors
Russell R. Beane
Brian M. Mann
Assignee (at issue)
Pacesetter Systems, 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.