Granted Patent
Utility
US 5,204,610 · App. 07/656,772
Long lived dual battery with automatic latching switch
Inventors:
John R. Pierson, Thomas J. Dougherty, Ronald Klassen
Patented Case
View Patent ↗
Granted: Apr 20, 1993
Filed: Feb 15, 1991
Inventors
John R. Pierson
Thomas J. Dougherty
Ronald Klassen
Assignee (at issue)
Globe-Union 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.