Granted Patent
Utility
US 4,655,545 · App. 06/568,563
Glass fiber for optical transmission
Inventors:
Toru Yamanishi, Yuji Kameo, Masaaki Yoshida, Masao Yuto, Chihaya Tanaka
Patented Case
View Patent ↗
Granted: Apr 7, 1987
Filed: Jan 6, 1984
Inventors
Toru Yamanishi
Yuji Kameo
Masaaki Yoshida
Masao Yuto
Chihaya Tanaka
Assignee (at issue)
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.