Granted Patent
Utility
US 4,453,139 · App. 06/320,981
Frequency offset multiple cavity power combiner
Inventor:
Frederik Labaar
Patented Case
View Patent ↗
Granted: Jun 5, 1984
Filed: Nov 12, 1981
Inventor
Frederik Labaar
Assignee (at issue)
Ford Aerospace & Communications 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.