Granted Patent
Utility
US 4,562,302 · App. 06/451,944
Inside telecommunication cable
Inventors:
John A. Checkland, Leo Victor Woytiuk
Patented Case
View Patent ↗
Granted: Dec 31, 1985
Filed: Dec 21, 1982
Inventors
John A. Checkland
Leo Victor Woytiuk
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.