Granted Patent
Utility
US 4,381,269 · App. 06/316,834
Fabrication of a low-loss plastic optical fiber
Inventors:
Toshikuni Kaino, Michiya Fujiki, Shigeo Nara, Shigeru Oikawa
Patented Case
View Patent ↗
Granted: Apr 26, 1983
Filed: Oct 30, 1981
Inventors
Toshikuni Kaino
Michiya Fujiki
Shigeo Nara
Shigeru Oikawa
Assignee (at issue)
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.