Granted Patent
Utility
US 4,897,799 · App. 07/096,738
Format independent visual communications
Inventors:
Didier J. Le Gall, John D. Robbins
Patented Case
View Patent ↗
Granted: Jan 30, 1990
Filed: Sep 15, 1987
Inventors
Didier J. Le Gall
John D. Robbins
Assignee (at issue)
Bell Communications Research, 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.