Granted Patent
Utility
US 5,263,869 · App. 07/694,650
Interactive group communication system
Inventor:
Jakob Ziv-El
Patented Case
View Patent ↗
Granted: Nov 23, 1993
Filed: May 2, 1991
Inventor
Jakob Ziv-El
Assignee (at issue)
Interactive Communication Systems, Inc.
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.