Granted Patent
Utility
US 6,821,030 · App. 10/355,001
Optical coupling apparatus
Inventors:
Kazuyuki Fukuda, Hideyuki Kuwano, Yoshiaki Niwa, Naoki Matsushima
Patented Case
View Patent ↗
Granted: Nov 23, 2004
Filed: Jan 31, 2003
Inventors
Kazuyuki Fukuda
Hideyuki Kuwano
Yoshiaki Niwa
Naoki Matsushima
Assignee (at issue)
Opnext Japan, Inc.
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.