Granted Patent
Utility
US 6,071,441 · App. 09/147,258
Method of manufacturing distributed refractive index optical fiber
Inventors:
Koji KOGANEZAWA, Noriyuki Yoshihara, Tsuyoshi Onishi, Takashi Tsukamoto
Patented Case
View Patent ↗
Granted: Jun 6, 2000
Filed: Nov 13, 1998
Inventors
Koji KOGANEZAWA
Noriyuki Yoshihara
Tsuyoshi Onishi
Takashi Tsukamoto
Assignee (at issue)
ASAHI GLASS CO., 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.