Granted Patent
Utility
US 4,344,669 · App. 06/091,997
Coated glass fibers for optical transmission
Inventors:
Naoya Uchida, Masaaki Yoshida, Toru Yamanishi
Patented Case
View Patent ↗
Granted: Aug 17, 1982
Filed: Nov 7, 1979
Inventors
Naoya Uchida
Masaaki Yoshida
Toru Yamanishi
Assignees (at issue)
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
SUMITOMO ELECTRIC INDUSTRIES, LTD.
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.