Granted Patent
Utility
US 5,136,648 · App. 07/579,278
Message storage security system
Inventors:
Peter D. Olson, Holley Taylor, Thomas Mandey
Patented Case
View Patent ↗
Granted: Aug 4, 1992
Filed: Sep 5, 1990
Inventors
Peter D. Olson
Holley Taylor
Thomas Mandey
Assignee (at issue)
Octel Communications 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.