Granted Patent
Utility
US 4,317,216 · App. 06/148,464
Bi-directional filter system for amplifying signals in separate frequency bands
Inventor:
Daniel P. Kaegebein
Patented Case
View Patent ↗
Granted: Feb 23, 1982
Filed: May 9, 1980
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.