Granted Patent
Utility
US 4,869,959 · App. 06/263,610
Electrically insulated wire
Inventors:
Eric Marsden, John A. Checkland
Patented Case
View Patent ↗
Granted: Sep 26, 1989
Filed: May 14, 1981
Inventors
Eric Marsden
John A. Checkland
Assignee (at issue)
Nortel Networks Limited
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.