Granted Patent
Utility
US 4,491,977 · App. 06/387,059
Millimeter-wave quasi-optical planar balanced mixer
Inventor:
Jeffrey Paul
Patented Case
View Patent ↗
Granted: Jan 1, 1985
Filed: Jun 10, 1982
Inventor
Jeffrey Paul
Assignee (at issue)
Hughes Aircraft Company
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.