Granted Patent
Utility
US 5,212,021 · App. 07/839,415
Energy pack and individual battery cell cartridge
Inventors:
Richard B. Smith, Bruce McDonald
Patented Case
View Patent ↗
Granted: May 18, 1993
Filed: Feb 21, 1992
Inventors
Richard B. Smith
Bruce McDonald
Assignee (at issue)
Duracell 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.