Granted Patent
Utility
US 4,837,530 · App. 07/132,088
Wideband (DC-50 GHz) MMIC FET variable matched attenuator
Inventor:
Hiroshi Kondoh
Patented Case
View Patent ↗
Granted: Jun 6, 1989
Filed: Dec 11, 1987
Inventor
Hiroshi Kondoh
Assignee (at issue)
Hewlett-Packard Company, L.P.
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.