Granted Patent
Utility
US 5,796,886 · App. 08/669,691
Optical coupler 2.times.2 optical switch and method for optical switching therewith
Inventors:
Song Cheol Hong, Doo-Young Ha
Patented Case
View Patent ↗
Granted: Aug 18, 1998
Filed: Jun 24, 1996
Inventors
Song Cheol Hong
Doo-Young Ha
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.