Granted Patent
Utility
US 4,291,269 · App. 06/052,733
System and method for frequency discrimination
Inventor:
Edward J. Nossen
Patented Case
View Patent ↗
Granted: Sep 22, 1981
Filed: Jun 28, 1979
Inventor
Edward J. Nossen
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.