Granted Patent
Utility
US 4,841,561 · App. 07/129,983
Operating default group selectable data communication equipment
Inventor:
Gregory Paul Hill
Patented Case
View Patent ↗
Granted: Jun 20, 1989
Filed: Dec 8, 1987
Inventor
Gregory Paul Hill
Assignee (at issue)
General DataComm, 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.