Granted Patent
Utility
US 5,729,591 · App. 08/707,096
Credit card operated cellular phone
Inventor:
Ken Bailey
Patented Case
View Patent ↗
Granted: Mar 17, 1998
Filed: Sep 3, 1996
Inventor
Ken Bailey
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.