Granted Patent
Utility
US 4,801,186 · App. 06/692,922
Coated optical fiber, fabrication process thereof and fabrication apparatus thereof
Inventors:
Makoto Wagatsuma, Fumio Yamamoto, Takao Kimura, Yoshito Shuto, Shinzo Yamakawa
Patented Case
View Patent ↗
Granted: Jan 31, 1989
Filed: Jan 17, 1985
Inventors
Makoto Wagatsuma
Fumio Yamamoto
Takao Kimura
Yoshito Shuto
Shinzo Yamakawa
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.