Granted Patent
Utility
US 5,208,738 · App. 07/627,157
Constant frequency resonant DC/DC converter
Inventor:
Praveen Jain
Patented Case
View Patent ↗
Granted: May 4, 1993
Filed: Dec 13, 1990
Inventor
Praveen Jain
Assignee (at issue)
Nortel Networks Limited
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.