Granted Patent
Utility
US 5,973,939 · App. 08/705,577
Double forward converter with soft-PWM switching
Inventor:
F. Dong Tan
Patented Case
View Patent ↗
Granted: Oct 26, 1999
Filed: Aug 29, 1996
Inventor
F. Dong Tan
Assignee (at issue)
TRW 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.