Granted Patent
Utility
US 4,990,760 · App. 07/347,390
IC card having means for protecting erroneous operation
Inventors:
Nobuhiro Tomari, Kougi Tanagawa
Patented Case
View Patent ↗
Granted: Feb 5, 1991
Filed: May 4, 1989
Inventors
Nobuhiro Tomari
Kougi Tanagawa
Assignee (at issue)
OKI ELECTRIC INDUSTRY CO., LTD.
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.