Granted Patent
Utility
US 4,792,849 · App. 07/081,189
Digital interactive communication system
Inventors:
Karl W. McCalley, Steven David Wilson, James L. Fischer
Patented Case
View Patent ↗
Granted: Dec 20, 1988
Filed: Aug 4, 1987
Inventors
Karl W. McCalley
Steven David Wilson
James L. Fischer
Assignee (at issue)
Telaction 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.