Granted Patent
Utility
US 4,797,878 · App. 07/086,518
Multiple virtual multipoint modem using TDM/token throwing technique
Inventor:
Thomas R. Armstrong
Patented Case
View Patent ↗
Granted: Jan 10, 1989
Filed: Aug 18, 1987
Inventor
Thomas R. Armstrong
Assignee (at issue)
PARADYNE 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.