Granted Patent
Utility
US 4,249,147 · App. 06/013,363
Cavity filter and multi-coupler utilizing same
Inventor:
Daniel P. Kaegebein
Patented Case
View Patent ↗
Granted: Feb 3, 1981
Filed: Feb 21, 1979
Inventor
Daniel P. Kaegebein
Assignee (at issue)
TX RX Systems, Inc.
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.