Granted Patent
Utility
US 4,825,052 · App. 06/947,882
Method and apparatus for certifying services obtained using a portable carrier such as a memory card
Inventors:
Francois Chemin, Michel Ugon
Patented Case
View Patent ↗
Granted: Apr 25, 1989
Filed: Dec 30, 1986
Inventors
Francois Chemin
Michel Ugon
Assignee (at issue)
Bull CP8
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.