Granted Patent
Utility
US 4,757,535 · App. 06/865,496
System for encrypted information transmission
Inventors:
Norbert Erbes, Dietrich Rother
Patented Case
View Patent ↗
Granted: Jul 12, 1988
Filed: May 20, 1986
Inventors
Norbert Erbes
Dietrich Rother
Assignee (at issue)
Alcatel N.V.
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.