Granted Patent
Utility
US 4,918,689 · App. 07/257,428
Asynchronous communication system
Inventor:
Yu Hui
Patented Case
View Patent ↗
Granted: Apr 17, 1990
Filed: Oct 13, 1988
Inventor
Yu Hui
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.