Granted Patent
Utility
US 5,933,854 · App. 08/541,300
Data security system for transmitting and receiving data between a memory card and a computer using a public key cryptosystem
Inventor:
Yoshimasa Yoshimura
Patented Case
View Patent ↗
Granted: Aug 3, 1999
Filed: Oct 10, 1995
Inventor
Yoshimasa Yoshimura
Assignee (at issue)
MITSUBISHI ELECTRIC CORPORATION
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.