Granted Patent
Utility
US 6,654,883 · App. 09/257,319
Device authentication and encrypted communication system offering increased security
Inventor:
Makoto Tatebayashi
Patented Case
View Patent ↗
Granted: Nov 25, 2003
Filed: Feb 25, 1999
Inventor
Makoto Tatebayashi
Assignee (at issue)
SUMITOMO ELECTRIC INDUSTRIES, 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.