Granted Patent
Utility
US 4,223,283 · App. 05/969,157
Two into three port phase shifting power divider
Inventor:
Kwok Keung Chan
Patented Case
View Patent ↗
Granted: Sep 16, 1980
Filed: Dec 13, 1978
Inventor
Kwok Keung Chan
Assignee (at issue)
RCA Corporation
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.