Granted Patent
Utility
US 5,159,540 · App. 07/848,608
High-efficiency saturable core voltage converter
Inventor:
James Cheng Lee
Patented Case
View Patent ↗
Granted: Oct 27, 1992
Filed: Mar 9, 1992
Inventor
James Cheng Lee
Assignee (at issue)
Hughes Aircraft Company
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.