Granted Patent
Utility
US 4,657,340 · App. 06/683,519
Terminal device for optical fibers
Inventors:
Toshiyasu Tanaka, Sadakazu Ariga
Patented Case
View Patent ↗
Granted: Apr 14, 1987
Filed: Dec 19, 1984
Inventors
Toshiyasu Tanaka
Sadakazu Ariga
Assignee (at issue)
E.I. DU PONT DE NEMOURS AND COMPANY
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.