Granted Patent
Utility
US 5,047,731 · App. 07/577,873
Variable gain wideband bipolar monolithic amplifier
Inventor:
Donald M. Lee
Patented Case
View Patent ↗
Granted: Sep 10, 1991
Filed: Sep 5, 1990
Inventor
Donald M. Lee
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.