Granted Patent
Utility
US 4,581,690 · App. 06/589,965
Switched-mode power supply with output post-regulator
Inventor:
Randy G. Russell
Patented Case
View Patent ↗
Granted: Apr 8, 1986
Filed: Mar 15, 1984
Inventor
Randy G. Russell
Assignee (at issue)
Zenith, LLC
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.