Granted Patent
Utility
US 6,549,330 · App. 09/659,630
Optical gain fiber doped with rare earth ions
Inventors:
Yong Gyu Choi, Dong Sung Lim, Doo-Hee Cho, Kyong Hon Kim
Patented Case
View Patent ↗
Granted: Apr 15, 2003
Filed: Sep 12, 2000
Inventors
Yong Gyu Choi
Dong Sung Lim
Doo-Hee Cho
Kyong Hon Kim
Assignee (at issue)
ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
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.