Granted Patent
Utility
US 4,334,733 · App. 06/114,460
Coated glass fibers for optical transmission
Inventors:
Mikio Takeshima, Masaaki Kawase, Toru Yamanishi, Masaaki Yoshida
Patented Case
View Patent ↗
Granted: Jun 15, 1982
Filed: Jan 23, 1980
Inventors
Mikio Takeshima
Masaaki Kawase
Toru Yamanishi
Masaaki Yoshida
Assignees (at issue)
Nippon Telegraph and Telephone Public 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.