Granted Patent
Utility
US 4,686,614 · App. 06/852,064
Reduced EMI noise in switched-mode power supply
Inventor:
Louis B. Costello
Patented Case
View Patent ↗
Granted: Aug 11, 1987
Filed: Apr 15, 1986
Inventor
Louis B. Costello
Assignee (at issue)
Zenith Electronics 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.