Granted Patent
Utility
US 4,703,998 · App. 06/708,769
Water-blocked optical fiber cable
Inventors:
Fumikiyo Uchioke, Ichiro Ogasawara, Shuzo Suzuki
Patented Case
View Patent ↗
Granted: Nov 3, 1987
Filed: Mar 5, 1985
Inventors
Fumikiyo Uchioke
Ichiro Ogasawara
Shuzo Suzuki
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.