Granted Patent
Utility
US 5,280,649 · App. 07/900,967
Superconducting balanced mixer
Inventor:
Leon Riebman
Patented Case
View Patent ↗
Granted: Jan 18, 1994
Filed: Jun 18, 1992
Inventor
Leon Riebman
Assignee (at issue)
AEL Defense Corp.
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.