Granted Patent
Utility
US 4,647,834 · App. 06/682,553
Battery charger
Inventor:
Cordell V. Castleman
Patented Case
View Patent ↗
Granted: Mar 3, 1987
Filed: Dec 17, 1984
Inventor
Cordell V. Castleman
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.