Granted Patent
Utility
US 4,399,562 · App. 06/286,406
Full balun mixer
Inventor:
Ben R. Hallford
Patented Case
View Patent ↗
Granted: Aug 16, 1983
Filed: Jul 24, 1981
Inventor
Ben R. Hallford
Assignee (at issue)
Rockwell International 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.