Granted Patent
Utility
US 6,411,801 · App. 09/399,832
Double balanced active mixer
Inventors:
Min Gun Kim, Sung Won KANG, Eung Oh, Jae Jin Lee
Patented Case
View Patent ↗
Granted: Jun 25, 2002
Filed: Sep 21, 1999
Inventors
Min Gun Kim
Sung Won KANG
Eung Oh
Jae Jin 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.