Granted Patent
Utility
US 4,833,428 · App. 07/126,569
14/12 GHz Duplexer
Inventors:
Chuck K. Mok, Alain Martin
Patented Case
View Patent ↗
Granted: May 23, 1989
Filed: Nov 30, 1987
Inventors
Chuck K. Mok
Alain Martin
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.