Granted Patent
Utility
US 4,591,539 · App. 06/714,628
Metal-air cathode button cell
Inventors:
John Edward Oltman, Denis D. Carpenter, Robert B. Dopp
Patented Case
View Patent ↗
Granted: May 27, 1986
Filed: Mar 21, 1985
Inventors
John Edward Oltman
Denis D. Carpenter
Robert B. Dopp
Assignee (at issue)
Rayovac Corporation
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.