Granted Patent
Utility
US 6,400,239 · App. 09/498,997
Microwave filter with a movable shield having alignment windows
Inventors:
Oh Gon Chun, Chang Hwa Lee, Bon Hee Koo, Dong Suk Jun, Sang Seok Lee
Patented Case
View Patent ↗
Granted: Jun 4, 2002
Filed: Feb 4, 2000
Inventors
Oh Gon Chun
Chang Hwa Lee
Bon Hee Koo
Dong Suk Jun
Sang Seok Lee
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.