Granted Patent
Utility
US 4,716,509 · App. 06/834,306
PWM inverter with trapezoidal output
Inventor:
Silvio Roccucci
Patented Case
View Patent ↗
Granted: Dec 29, 1987
Filed: Feb 27, 1986
Inventor
Silvio Roccucci
Assignee (at issue)
Selenia Spazio
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.