Granted Patent
Utility
US 4,647,151 · App. 06/664,809
Optical communication cable
Inventors:
Ferdinand Grogl, Hans-Jorg Widler
Patented Case
View Patent ↗
Granted: Mar 3, 1987
Filed: Oct 25, 1984
Inventors
Ferdinand Grogl
Hans-Jorg Widler
Assignee (at issue)
International Standard Electric 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.