Granted Patent
Utility
US 4,959,829 · App. 07/331,468
Dual cable communication system
Inventor:
John Robert Griesing
Patented Case
View Patent ↗
Granted: Sep 25, 1990
Filed: Mar 30, 1989
Inventor
John Robert Griesing
Assignee (at issue)
Wang Laboratories, 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.