Granted Patent
Utility
US 4,966,434 · App. 06/642,820
Optical fiber cable
Inventors:
Shinichi Yonechi, Yukinori Ishida, Masaaki Kawase
Patented Case
View Patent ↗
Granted: Oct 30, 1990
Filed: Aug 21, 1984
Inventors
Shinichi Yonechi
Yukinori Ishida
Masaaki Kawase
Assignees (at issue)
SUMITOMO ELECTRIC INDUSTRIES, LTD.
Nippon Telegraph and Telephone Public 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.